Karen, I was in tears reading your story. I too struggled for years with fatigue, muscle weakness, vision problems etc.. In 2010 I had to have a total knee replacement. After the surgery my other symptoms escalated. The doctors (including specialists) told me they felt it was all from emotionals issues. Then in the summer of 2010 my family had sent me for a chest xray to check for pneumonia. The office called to let me know they had found a tumor in my chest by august I was in surgery with a nerosurgen who removed the tumor with my thymus gland. After the surgery I had developed major respetory issues. The doctors continued to believe it was all in my head. I too decided I needed to go to the mayo clinic to see if the could help me. Upon getting to the clinic for my appointment the staff & doctors were very professional and caring. I was blessed to be able to see the head doctor of neurology. After just 10 mins with him. I was given the possible diagnosis of mg. After the numerous tests and the neurologists going over the records I had brought to them I too was given the diagnosis of mysthenia gravis. I am very grateful to the doctors & staff at the clinic for all they have done for me back then. I pray you continue to enjoy life.. Thank you for sharing your story.. God Bless!