Don't give up! Nothing is impossible until you tell your mind that it is.
See the list of winners that have managed to write their 50k in just the first week - crazy amounts of writing but it proves that you can do it if you want. I know college is demanding (I'm there with you on that one) but the spirit of NaNo only truly lasts for one month in an entire year (Camp NaNo feels different all round).
So you will defeat those college papers, and you will defeat NaNo... now, let me hear some motivation from you! cool