Believe in yourself! Dude, although chemistry is almost the first in the class, it was also a headache at first. Remember: all the questions asked by the teacher can't be left unclear!
Believe in yourself unconditionally, even if you don't do well, it's temporary.
Note: most of the chemistry exams are teachers' expanding knowledge, and so is the college entrance examination. Books are only the simplest things, so it is important to take notes. Other courses seem to be similar in books. It is suggested to find a notebook for chemistry, because there are many and complicated things. Even seemingly distant knowledge may be tested in any inference problem.
I think chemistry is a liberal arts subject that needs skills, not a science subject, because you can't do well in the exam without memorizing.