Re: lupus and vitamin b12
Hi & welcome. Sorry you're having symptoms that may prove to be lupus. I hope it's not, but if it is, many people do pretty well these days with proper treatment & ongoing followups, so hang tough!
B-12 (and other deficiencies) are common in lupus, I think, because its inflammatory processes can easily deplete levels. (I had numerous occurrences of low B-12 and Folate before being dx'ed.)
I had swallowing problems, too. I turned out to be in the anti-Ro subgroup. The anti-Ro autoantibody is seen in both lupus and Sjogren's syndrome, and it's possible to have both (I was dx'ed only with lupus). Thyroid deficiency is another possible cause; and it also can co-exist with lupus, so it makes sense to have your thyroid levels checked too.
What kind of dr. are you seeing, a rheumatologist? Just curious b/c they're the ones best versed in lupus & should also know to check for other conditions that can mimic lupus &/or co-exist with lupus. I hope this helps a little, that others add more, and that you keep posting here. Sending my best wishes, sincerely, Vee