Hi, though I dont relate with this and I dont want to reasure or anything but thanks for explaining perfectly what your going through. Try and relize you are not alone. I hope the best for you to get some relief.
When I had it I felt the same exact way and now I'm 90% recovered! I recommend you purchase the book Depersonalization Manuel! That whats got me out!! If you can't afford it maybe I can help! Stay strong!