I am sorry you are having a difficult time at the moment, the things you have been through though, it is not surprising that in some moments they pop up again.
I am so sorry that you have had to feel such betrayal in your life, and sorry you lost your Dad this way, you were so young and probably didn't fully understand everything happening.
I deal with my 'issues', without therapy, I do get medication from my Dr though, and I can't see why a Dr wouldn't prescribe you medication. I draw strength from reading biographies, though there are few written in relation to what I have been through, but any biography that shows tenasity of spirit helps.
Hope someone with a better answer comes and posts.