Yeh, keep it. Dont lose Chemistry, until you really think you are struggling. Remember, Chemistry is life, and if you lose life, where else will you go?
Also, another thing, never give up. During my HSC Chemistry course, i preety much failed my first 2 assessments and my ranking got as low as 19th. The next 4 assessments, I averaged 95% and came 1st in the trial, and overall first. So, never give up. If you have the MOTIVATION, and EAGERNESS to do well, you will do well. When you study chemistry, make sure you try to study beyond what the school provides, the two books I cross referenced and read and do questions in were Conquering Chemistry by Roland Smith and Chemistry Contexts 2 by Debbie Irwin. Both books are great books and have brilliant exercises and explanations.
I hope you continue studying chemistry.