I DONT KNOW WHAT THE ******** TO DO!!!!!!

I need advice please.
OK well i gave just started a trade school college to become a dental assisant. On day one the teacher was horrible.(but i gave her a shot)
What happened was the orgnial teacher was fired for not teaching at all so his assistant in lab work took over. So in our class there is people
who have been there for 2 months. DONT KNOW WHY I thought mayvbe its because the school pushed them back knowing that the teacher wasnt teaching so they assummed they didnt know anything, but I was wrong on that. (will explain in further in story)
So i will say this is how the teacher went over everything she assumed everyone knew alot about dentistry andor placed as if were already been there for 2 months when it was our first day. SO she was like ADHD on crack no joke. I know college is hard and challenging but no one not just me in the class can keep up. I mean it was the first week and we had 12 chapters to do in one day a test on thurdays of two and labs. (which i got through but havent been able to catch up) Which by the way all 12 chapters have nothing to do with eachother at all. It jumps form on subject to another and we are supposed to learn it all the next day. There is no way. On the secong day she wrote homework on the board saying 21 and 31 for homework. Then without telling the class erased 21 and put up 11. I caught it but some didnt. The the third day about half the class had 21 instead of 11 she said thats your fault i told yall when she didnt and failed them for the day. So trying to keep up for everything the first week comes the second week. We are going of the review for the next test she starts shouting out questions on the test expecting us to get it all down she gets fustrated cause we cant keep up cause these are like 3 sectence long questions. We go on break and come back she starts writting them on the board everyone copies them down. She stops and says find them in the book. No what chapters they are over or page number just sayd good luck. Everyone is like WTF so she gets fustrated againwe go on another break and come back. She writes some on the board and then gives otheres to a group to look it up and there is about 25 of us 3 at each table. We asked her what was the questions she gave to the other groups? She just replyed not my fault you anit listening. Sobasicly she wquickly wipped out 5 questions at once one right after another and we were supposed to look up our anwers all at the same time.
So after about 2 weeks into this my stress levels are horrible I almost had a panic attack in one of our labs,and im nto sleeping except maybe a couple hours here and there due to the stress.Weve already had one person drop out cause she had a part tiem job and couldnt do both cause there was just to much to keep up with. Plus the trade school is supposed to be hands on but for the past month ive done most of my learning at him and fromt the book. (Sometimes i wondering why I even come to class just show up for labs and I would be good.) The thing that bothers me the most is half the time were just bsing about s**t that doesnt matter. Sometimes its cool but we will be sittign in class going over s**t and we wil get off subject she said after break we will come back to it. We come back and we never do. Or if she says we will go over it later we never do. Hell its annoying cause you dont know if your right or not cause she never goes over anything. Like i missed 2 on a test i asked he what i missed and she replyed dont worry about it i dont go over it. WTF GRRCACHA
Well I struggling just to keep up in class remembering all this s**t in the book tools and termology today was just pissed me off. I got to class and class started she was looking through her paper work. Everyone knows we have 3 tests this week on thursday. So she sighs and says I lost one of the 3 tests and the agenda for the day.SHe didnt even know what homework weve did last night. We had to tell her wtf and shes asked that since day one and she asigned it. So finally today we went over some chapters in the book weve done for homework. Which throught the 3 hours was mostly bs-ing about random s**t. So now she says she lost one of the test so the new one she is going to make have no idea whats goping to be on it and the reviews we have are crap and she didnt tell us which one she lost !!!!!! *slams head into computer desk while typing. *
Third hour we go to luch and after luch we go to the lab. We have thee thing s we have to get marked off on and all have to do with using the tools. Which shes gone over some (which i suck at cause there a way you have to flip them in your hand and hand it to the dentist.) So i got a part where its a tool i havent used and she didnt explain how to use to the class. So my group kinda went with it and was liek try it like this. So she came over to mark us off on it cause we all had a part to do with different tools. So aftre 3 went before me i went and she was like wrong. She explained it and everything how to use it. Plus i was nervous so i was trying hard not to shake. After doign it a couple times she fails me on the mark offs. WTF which cause the group to lose points WTF *SIGH*

So through the weeks Ive been debting on what to do. My anut who is a dental assisant is helping me out with this. And she informed me of a dentist who is all hands on who trades people out of his office and helps you get your licences to become a dental assistant for only 3 thousand in 13 weeks. When Im going to kaplan college for 9 months 3 months intership for 15 thousnad dollars and dealing with a techer who cant teach and through into a postion she cant or isnt ready for 15 thousand dollars. This is the problem If i drop out and go do the other I will owe money to the school for my loan and have to pay the guy as well. Or i can stay with the school and pay a s**t load. Plus also I loath this profession I only throwed myself into it cause I dont know what I wanted to do and needed to get started on something. Plus I know it makes good money and is an in demand feild of work. I just dont know what to do. If i do drop out I dont know if i even wanna be a dental assisant and be back at stage one no jobtrying to figure s**t out.

If i drop out i will feel like a failure and make my husband and my family think even more poorly of me. Plus my husband is already stressed about the money of it all and stressed about me dropping out. That were trying to get our life straight and together getting our own place and etc. I need to go to college so i can get a better paying job so we dont have to struggle. I know all that and i need to just this is bullshit i hate this ******** job. Ive been so depressed and stressed just trying to force myself to learn it and like it. Plus deal with this crack head of a teacher.I just need an opinion from someone that im not crazy or im just a bitcher.I dont want to let my husband down and if i drop out i will feel like iam and that he will think ill just drop out of everything that I try to do.