Overwhelmed

I have so much to do before I could say I finished my first year of college. I studied for almost 12 hours for my anatomy practical and quiz tomorrow and I am currently studying for my chem quiz tomorrow. I have absolutely no idea what I'm doing in chemistry and I am trying to teach myself but it is just so hard and I am feeling so overwhelmed. But if I made it this far in the semester, I could make it one more week!