Possible misdiagnosis

Twelve years ago I was diagnosed with MG after nearly 3 years of going from doctor to doctor trying to find one who would take me seriously. By some divine intervention, I mistakenly was sent to a neurologist who, after a couple of visits, made the diagnosis of MG- a disease I had never heard of but totally fit the discription to include the extremely odd-ball symptoms peculiar to MG. I was elated, even though she said it was incurable and, at that time, largely untreatable, just to have an explanation for what was going on. Over the years, it seemed to get much better with only an occasional flare-up, usually after situations of unusual stress. Then my neurologist moved away and I started seeing another. He doubted my diagnosis, ran an EMG which showed mostly negative results. In the meantime, I found from an MRI that I have a Rathke's Cleft cyst which, according to "the Google" is beyond the perameters of safety but which both the new neurologist and the neurosurgeon deemed insignificant, even though I have nearly all the signs of Cushing's disease. As I make an objective self-evaluation, I can see the doctors' dilemma because I haven't had the level of MG symptoms for several years that I had in the beginning, so I suggested perhaps it is in remission. I have the very strong feeling that the doctors are placating me by agreeing that it is a possibility but that they really believe there's nothing wrong with me at all; that I'm a hypochondriac, looking for attention, or whatever. So now I'm back to square one and finding it very difficult psychologically to start down this road all over again. My question is, has anyone else had this happen and if so, what did you do about it?