If I could jump through this computer and hug you I would!
I have been having the same thing with my tongue but didn't want to post it because I figured it was "just me" When you said
"about 1 hour later I have problems swallowing and my mouth feels very weird, kinda thick feeling"
I almost cried, because the mestinon helps with the weakness and my vision but the tongue tingling and "swelling" feeling started along with trouble swallowing. I was fearful that it is my body reacting against the mestinon as I am hyper-sensitive to medications, I see my Dr in two weeks so please post and let me know what your Dr says.
You will be in my thoughts