Quandry, It sounds like you are having trouble with potassium. PLEASE go get your electrolytes and kidney function checked out with your primary doctor. "Swelling" is not normal (do you mean edema?) and should be thoroughly assessed. At least have a conversation with your PCP.

Citric acid foods can cause migraines too in some people.

If you get referred to a geneticist from a neuro, the costs might be paid for. There are other tests a neuro can do to check this family connection out.

It sounds like some solid thinking by a neuro would be a very good idea.

Take care,
Annie