So glad I found this sight, I was diagnosed with Myasthenia Gravis 3 years ago and I take mestinon when needed , now in the last couple of months my primary care feels I have RA, he did blood work but it showed negative but he said that is not unusual. I went to my neurologist the other day for my MG and she said she is very concerned and I looked ill and with all my symptoms: Fingers very swollen and painful and stiff, wrists painful, ankles swollen and painfull,toes painful and knees swollen and painful along with my elbows and shoulder,there are times in a day to try to stand and walk is unbearable, the pain is so horrific , and the use of hands become more and more limited. She feels it probably is RA but says there are other autoimmune and what ever it is it has taken over and is affecting my MG as well , in the meantime she says take Mobic and refered me to a Rheumaologist, which I cannot get in till December....My esr sed rate is 50....So here I am, I am scared as I don't want to go into a MG crisis, and Idon't know much about RA, is this normal, any help and suggestions and your advice would help me please.