The big difference between a BS and a BA is usually the math component. BA allow you to take more courses outside of sciences if you're so inclined. A BS usually prepares you to be a stronger, more focused, chemist.
A BS is usually stronger than a BA for graduate school applications IMO. That said, I know plenty of grad students/doctorates who have a BA. Try talking to some of your faculty members and see what they have to say.
Two questions, what year are you and what are your grades like?
Keep in mind that some of your credits may not transfer, so you might have to start over.