I know how you're feeling and I think you are having migraine headaches, to the extreme.
I don't know whether you have had a stroke or not, because I cannot comprehend much of what you wrote. That's not a meaningful indication, either, because I've never been able to read all the way through any of your forum posts
The important thing is that it seems like you said that your neuroligists doubt it, too, so you are probably in much better shape that you think your are.
I hope that, as the tests keep coming back inconclusive, someone at the Headache Center will sit down with you and explain that the most common cause of migraine headaches is stress, by far.
Even though - or perhaps because - I stated that, "the most common cause... is stress, by far," at least two dufuses will wade in here to list all the other things that cause migraines like, "My wife/sister/daughter/friend of friend's friend had headaches for years and they turned out to be allergies to water/air/second hand smoke/sunlight or driving on the right side of the road." These kinds of startling irrelevancies are exceedingly rare and reading them will do nothing but make you worry more than you do now.
I hope I've waived them off but, if not, try to ignore them and let your neurologists continue to screen for other causes. One of the chief causes of extreme stress is the anguish put on you by people (who do want to help you) telling you to take actions that don't match your personality or ability - like "Lawyer up, sue the bastards, give 'em hell."
Just try to get yourself into the frame of mind to start a full and frank discusstion about your stress during your next doctor's appointment. This will help you more than you can imagine right now. And, if you can't work yourself up to it, just blurt it out. You don't have to get anywhere right now, but you should try to get started.
Eventually you will figure out some things and make a plan to confront the problem. It will seem difficult and painful, and you are a long way from that point now. But you will get there and, when you can, it will prove to be far less painful than living for five months with the feeling of having a hot knife stuck through your skull.
Once you've calmed down, then you and your family can undertake a rational examination of how, when and why you were fired and sift through what courses are available to you to get your job back - if you still want it.
In the meantime, hang in there. I just re-read oscar's post #45 above. You could read that carefully yourself and start feeling some hope.