I was laid off in February and I had trouble sleeping Before & After the fact. I'm now at a new job making a little less money but then before but the work environment is so much better. I'm sleeping better, Feeling better, and haven't been happier in years.
There is life after GM. Your situation does not sound ideal and I hope you're able to get some peace of mind. For me, Getting laid off was the best thing that's happened to me in years.
Best of luck and I hope everything goes well for you
Some encouraging words from @ZgfkpY6-hus that I thought belnged on top.