Sounds a lot like my college experience. I did a double major and a minor + 2 jobs + a music ensemble + play a sport in college. Yep, I was insane. However, it was a lot of fun.
That being said, if this is making you so crazy that it's putting you in the hospital it is time to cut back. Honestly, grad/med schools are going to look mostly at your test scores and grades. Yes, all the extras help but you have to survive college first to even apply! And a key component to that is watching out for your mental health. Don't compare yourself to others, that leads to a slippery slope, especially since you're always going to find someone else who does something better than you.
Another thing. I'd seriously consider trying to focus more on your major rather than all the trimmings. I speak from experience. I was a little too well-rounded in college and once I hit grad school it made it a lot harder to adjust to just one topic. I actually went through a really down stage because I was not used to being so focused.
