I think what your therapist was telling you is that the flashbacks can't harm you not that stays in psych wards don't happen anymore. I know that they do mentally but they can't physcally harm you.

You have been through a lot so it's no wonder you suffer with PTSD. Killing yourself is not the answer though. God will be with you through all of this and see you through. Remember Footprints. He can carry you as you deal with these issues and get well. He obviously has more for you to do because you are still alive. I'll keep you in my prayers.