@mishkamilad - I understand how upsetting it is not getting a straight answer from so many doctors.
My daughter spent years going to numerous doctors for similar symptoms- she gained a lot of weight quickly- this girl was a competitive swimmer-, developed diabetes, muscle weakness etc.
She finally found a doctor who knew what was happening to her.
There are many of these illnesses that are rare and most doctors never see a patient with an unusual diagnosis such as Cushing’s.
That’s why you have to find a major teaching hospital that is known to specialize in pituitary problems. Your best bet would be to be seen at Mayo Clinic.
Would you be able to visit one of the Mayo Campuses?
By the way, I have another daughter overseas who is struggling to find a doctor knowledgeable enough to understand that she may also have Cushing’s. She had one elevated cortisol and can barely function because of extreme exhaustion and body pain.