Hello and welcome to the NeuroTalk Support Groups.
I can't help you with the conditions you are dealing with but I will post a couple of links below.
https://www.neurotalk.org/myasthenia-gravis/
https://www.neurotalk.org/autoimmune-diseases/
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I also found some older posts/threads by using the search term
" Spondyloarthropathy " which I suspect is what you meant.
https://www.neurotalk.org/search.php
https://www.neurotalk.org/search.php?searchid=3562977
All the best for your appointment. It's a pity it's so far away.
btw I too had some health issues after my vaccines. That was caused by my having immune reaction greater than expected due to my being on a treatment called Immunotherapy which causes revved up immune system in very basic terms. Allthough it took a while to stabilize, I feel much stronger again now.