Go to Urgent Care. That's the only sensible advice. Then, on Monday, go see an allergist and figure this out so you won't go insane!!!

Have them check your Trypsin levels in urgent care to see if you are having a "real" allergic reaction. And, no, itching is not a symptom of MG.

This is nothing to mess with. If it's an allergic reaction, you have no idea if it's going to get worse or how fast. Are you still taking the Mestinon?!

Please go in. If you don't have an urgent care, go to the ER. I hope you get some help very soon.

Annie