Were you laid off because of the diagnosis of stroke?
There might be some legal employment issues regarding that.
I'm not sure. If a larger business the HR dept should have been helpful...
How long had you worked there?

It seems like it could have been done as a medical leave of absence??
At least until the dx is official or a second opinion saying it is true or not true?

If the stroke dx gets cleared up as not a factor could you return to that job? Would a MG dx still affect that job & requirements?

Are you getting unemployment monies since it was a lay off?

You might be able to get temporary disability payments, but I don't know which pays out best temp disability $$ vs unemployment $$..

You might ask about temp/disability info on our Social Security Disability forum.
http://neurotalk.psychcentral.com/forum28.html

Or maybe the members here have gone thru similar things.