Are you a Chemistry major? If so, I think that is a wise decision from what you posted. Now a days, a Bachelors doesn't mean much because nearly EVERYONE has one. It's essentially the equivalent to receiving a high school diploma a generation ago. A master's or some sort of post-collegiate degree is really what separates one from the pack (credentials, past experience and who you know aside).
Since this is the case, it really would be wise to do something you're interested in and excel at. I'm a second year Chemistry major and the difference between an upper level course like Organic and Gen Chem is like night and day, in terms of difficulty. If you don't enjoy and succeed at the subject, it's only going to get much worse.