Hi and welcome,
You definitely have a lot going on, a neurological condition like MS is highly unlikely to be the link though, there's genuinely nothing you've mention that would be suggestive-consistent with MS. The majority of what you've been dealing with is not associated with MS and the few things that could be are already account for with your medically dx preexisting conditions.
To add to what ever possible link there might be pointing away from neurological conditions like MS, you don't actually have any suggestive-consistent visual or MRI diagnostic evidence of brain and or spinal cord lesions, Multiple Sclerosis literally means many scars and without them it's pretty much a red flag.....it's not outside the norm for someone to be dx with more than one autoimmune condition, the only link i'm aware of though is that it's autoimmune and a compromised immune system makes you more susceptible to many other illnesses...
I hope that helps a little......JJ