school sucks

ok so this semester has been hectic already and we are only a month into school. this semester i am taking up chemistry with the lab, english, personal relationsips, and human sexuality. between the english and the chem i dont know which one is going to make me fold first. already written two papers and had one chemistry exam (which i bombed). i took that exam so damn confident and when i seen my grade i cried... I CRIED. i mean i thought i was going to do sooo much better than that.. i guess im not as smart as i think i am. after the exam though i doubt myself everyday. i used to walk into class confident, now i walk into class questioning everything and now that is confusing more than i originally was. i dont know what to do. you will think that after three years i would be used to this but im not. i feel dumber with each passing year. its whatever...