You can 100% get noise cancelling headphones or just simple earbuds or some ear protection construction workers use to get rid of loud noises. You can probably talk about the group therapy being in the way of your studying and lessen it, especially since it's an hour away and clearly obstructive. Are you in med school right now or trying to get in?
It doesn't sound like you have a proper reason to kill yourself, and I hope I don't come across like an asshole here, that's not my goal. I am probably ending my own life within a couple months, but I think I'm older than you (turning 27, still young of course) and I have problems that go beyond loud noises (completely fixable) and problems with getting into or staying in school (in your situation it sounds fixable).
You should not end your life based on the reasons you have given. Of course, you mentioned meds and there's probably other problems you didn't mention, such as depression. Sorry for nagging.