Do you have diabetes? 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. That said, do you have a positive diagnosis of myasthenia gravis?
Ok I'll get a answer in January. Can anyone tell me what there symptoms are with miastiagravis and also the ones who have fibermialgia? Is there anything better to take having miastiagravis for anxiety?
I'd sure contact your doctor who diagnosted you with myasthenia gravis and report the increase in symptoms. I'm far from a health profressional, but it doesn't sound cardiac in nature. Keep us informed.