Major for someone thinking of med school in the future?

I'm a first year undergrad in a BSc majoring in biology, and I'm considering changing to a BA with a double major in biology and psychology so I'll be able to take courses that I find more interesting instead of the standard math, physics, and chem courses that comprise the BSc. Does anyone know if switching from a bachelor's of science to a bachelor's of arts but still majoring in biology would hurt my chances of getting into med school in the the future? And if I decide that med school isn't for me if I'll still have good employment opportunities?