Hi Steve and
It's good to have you here and I can assure you that this will be a place of tons of knowledge for you.
Unfortunately I was not diagnosed by just Mestinon. I had the blood work first and then the nerve tests next but I'm not much help in that are. But I can relate to your positive response to Mestinon. Major results immediately for me within 24 hours. It is my "get up and go" pill now and I'm so glad I can tolerate it. I also hope and pray that the day never arrives when it doesn't work anymore.
I do agree with the others, a solid dx is needed for your future....you never know what is down the road.
Thanks for joining us and we are glad to have ya!
JJ