I am somewhat in your same situation. I am in a Diploma program that takes 16 months to complete to get your RN. I failed a class this spring. Their policy is you must sit out a semester after failing, then return. So I was supposed to graduate this December but now I can't graduate until August 2018. I'm off this summer now and will return in the fail to complete the class I failed. So this time off has been very annoying because I just want to be in class. I've taken it upon myself to go back through my anatomy book, kind of reread it, find some online quizzes and keep that information in the front of my mind. I also have all of the ATI books that I plan on looking through soon. Also, with this time off I have been going through my previous nursing classes notes to keep that information fresh as well. Don't give up! We're so close.