Firstly, I am so sorry to hear this. I can't imagine how frustrating it must be to have made it this far and now be set back by something beyond your control.
Unfortunately I have no quick fixes to suggest for you, since it sounds like you have already taken the initiative to appeal the decision. I can only suggest that you discuss your situation with the university to reach a compromise. I assume that you were denied at the appeal stage due to the necessary practical aspects of being a social worker (I'm guessing driving for example is non-negotiable)? Would it be possible to enrol onto a similar course (e.g. psychology) with a view to transferring onto social work after a year if you remain symptom free? Absolutely check this before looking into this route (I am a dinosaur and university funding has changed since I studied), but my understanding is that you can still have your tuiton fees covered by a loan if you change courses after one year. Again, check this with the university and get it in writing that they'll let you transfer to social work, do not just assume that they'll let you.
Failing that, do all universities have the same occupational health stipulations for your course? Worth asking around to see if anywhere else could accept you in the circumstances, although admittedly unlikely if the courses are overseen and accredited by one governing body. If you are keen to go to university this year I would start making these enquiries now, i.e. literally today if possible, as the admissions lines will be ridiculously busy on results day/for clearing.
Finally, possibly worth a chat with your doctor about this? I understand that your condition is lifelong but if there are any possible changes to your treatment plan that might reduce the frequency of your clinical signs then that might be an avenue to investigate.
Best of luck for whatever you choose and my sincerest condolences again that you've found yourself in this position. I wish you good health for the future.