Your symptoms sure sound like nerve damage, maybe myasthenia gravis, maybe
diabetes. cold weather really has an effect on Neuropathy, I have it from
diabetes,
and take Gabapentin, which I think is a generic version of your nerve meds. I take 400mg, a big dose, and it helps.
I have congestive heart failure and swelling of the legs, which affects the nerves as well. Try cutting back on salt, lose at least ten pounds, and see if that helps. I don't understand your last question.