Genderhell,
That sounds really bizarre. TMD or TMJD is an umbrella term for many types of a dysfunctional jaw and there are a lot of causes. There are both possible genetic and hormonal causes. Based on your description, I don't know. There isn't a single treatment so just keep trying.
There are a number of hormonal surges to the brain. I'm guessing here but in your case, if there was a surge, it could relate to sexual differentiation of the brain or to the dominant hemisphere of the brain. (Are you left handed?) I'm going to postulate that the surge you are referring to happened, for some reason, while you were in the uterus and that it affected the hormone receptors in that side of the brain and the development of the jaw on that side of the brain. Not much that can be done but glad you were able to walk again. Is the other side of the brain affected at all?
Autism is another problem that seems to be poorly defined. There are three types and it doesn't appear that the cause of anyone is definitively known. Genetic mutations are one probable cause. The thyroid medication? I don't know which one your other was taking and if she kept taking it while she was pregnant. Then, there are no studies on possibility of an affect of which I am aware. I might be able to say "maybe" with more information but it would still be a "maybe".
Have you tried a top notch clinic like Mayo or UCLA Med Center or something like that?
I've got some real interesting genetics of my own that is causing some problems and a terrifying amount of pain. (I had ankle surgery last week. The surgery didn't hurt nearly as bad as the problem associated with my particular issue.) However, my pain is intermittent. Yours seems to just keep going. But I'm on doctor 27 next week. The endocrinology/metabolism group at Mayo agreed to see me. I just keep trying.
I can dig deeper if you would like. I'm a chemist/molecular toxicologist and can do very complete literature searches. However, a good clinic would be far better than I. I could help find a really good clinic for one problem at a time if you would like. I would need more specifics on each diagnosis.
In the end, I can only offer hugs and encouragement right now.
Hugs, Jen