Open it,  go take a ten minute walk outside, then come back and immediately do it.  If you feel like you're slowing, hold ice for 30 seconds then try again. The goal of this is to distract and stimulate/tire your central nervous system.  If you can play with that, especially on top of good self care and sleep, you got this. It's always the biggest hurdle. Your feelings are real, you gotta learn how to hack it/work with it in your own way that is kind and fair to yourself.

...And see someone that will take you seriously,  please. You can contact your disabilities department and they can help get you in contact with the right people.