Do you have a confirmed diagnosis of myasthenia gravis with either positive antibodies or SFEMG? MG according to another MG website is suppose to be on a special list of "Blue Book" diseases that has its own criteria for SSA. Here is a link:
http://www.ssa.gov/disability/profes...dult.htm#11_12.
I think you should try one of the private social agencies, such as Catholic Social Services. You do not need to be Catholic, but they can get you some assistance and help you navigate through the public assistance maze.
Good luck
kathie