I am not sure, but I don't think you would need to rehash your past with a new therapist. I think you could give your present therapist permission to share your file with a new therapist, and that would bring them up to speed.I'm already on my second therapist, and rehashing all my crap with a second person was just awful. I can't do it again.
As for the rest, yes life is a struggle, but it is worth living. Suicide is a permanent solution to a temporary problem. Yes, I know PTSD seems to be a permanent problem, but it can be beaten.
We need you here, so please hang tough, don't let this crap beat you.