Thanks for this... maybe I'll feel okay for the rest of the day because of this. Thanks again.Welcome to the site Hunter.
First off, you need to start accepting you will get better. As terrifying and lonesome as this disorder is, you will eventually get better with hard work and a good attitude.
I can relate to the childhood abuse and hypochondria. I actually just made a thread for childhood stories. I have constantly evaluated my health and told myself I must have something majorly wrong with me. The depersonalization is no different. Many, many users are sure they must have schizophrenia or worse with this disorder. A couple of its trademark symptoms are obsession and fear of going crazy. if you had schizophrenia, you would know by now.
You have had a rough life and its no wonder you ended up with this. Check out the links below, and feel free to ask any questions.