Oh wow I know how you feel, I also sometimes doubt God and that's not good and I also know what it's like to have your parents get divorced but mine got divorced when I was young so I don't think it had all that much of an affect on me. I'll keep you in my prayers. Oh and maybe this can help your doubts that is if you doubt his existance
http://www.youtube.com/watch?v=8qyc_Y2s9go&feature=related there are 6 parts to that
but if you doubt him helping you well remember he's always there to help his children although God does not listen to the wicked so I would suggest you always ask for forgiveness when you sin (and obviously be sincere about it) but I suggest you go through the book of Psalms. Pslams 115 and 116 are good ones they show god cares for you.