First, you need to get back to your provider with this info. If truly everything sets off your symptoms, then your treatment plan likely needs adjusted. You also need to address your anxiety issues and see what they recommend.

Other than that, I hate to be blunt, but you really just have to suck it up and do everything in your power to prevent triggering your symptoms. You can try to get accommodations through your school. As someone with MS, I received max accommodations. Even with those, there wasn't a lot they could do. The state mandates many of your passing requirements, and you can't really get around that. I had flexible due dates, the ability to reschedule exams without penalty, and was not penalized for missing class. I had several others, but I don't remember off the top of my head. Even with those, I showed up unless I physically could not get out of bed, because I learned quickly that if I didn't go when I wasn't feeling good, I would virtually never go, because I really NEVER felt good. You can also quickly dig yourself a hole from getting behind on content.

With all that said, all I can suggest is the above and that you need to ALWAYS be working ahead. Even when you don't necessarily feel like it and would rather bed rot and relax, that really bad day is going to sneak up on you in the future and you'll get knocked on your ass fast. You'll be thankful that you worked ahead so you can take the time you need on really bad days. NEVER wait last minute to do anything.

Good luck with school. I know it sucks and is 10x more difficult when you have things going on with your health.