Hi there,
I don't know what your parents' financial situation is, but if you can financially manage without doing the tutoring, then it seems like the most logical thing to let go. I admire you hanging in there with school, and hopefully, your doc will find the right combo of meds to get you in remission or at least feeling better. In other words, keep your hope up that you won't always feel this bad. I have a son in college and a daughter in high school, and as a mom I can tell you that I would much rather see you taking care of yourself. Please try not to feel guilty. It sounds like you are doing the best that you can!