Thanks! Looks like I'm just going to have to get permission to load up on credits for a semester. Or maybe I could do a summer of independent research at my home university and take a class at the same time, and I think that would also count for my chem and/or neuro independent project, freeing up another slot on my schedule. It'll all work out, I guess. I love physics and would love to be able to do as much as possible.
The good thing about the degree is that I'll have to do three independent projects by the time I graduate (1 chem, 1 neuro, and 1- assuming I keep my GPA up- chem honors thesis), so hopefully that'll make up for my degree having fewer math and physics requirements.
Also, would taking something like linear algebra or differential equations be useful? I've heard it is, but again, not sure if I'll have time. Maybe I could take those classes at a community college or my local university after I graduate if they'd really be worth it.