Stacy, I'm sorry to hear about this. It really does not make sense.
Have you tried coming right out and asking her why she has changed her mind about the migraines, and the other issues you mentioned?
Also, maybe it will help if you ask her exactly what she needs from the Rheumy.
Maybe if you get that cleared up she will be more willing to help with the disability and anything else you need.
She really should do the things she said she would do for you.
Let us know what happens kay.
I pray it will all work out.
Debbie