I honestly don't know what to tell you about this except, you're not alone. I could easily have written this thread myself. Every single thing you said, I have been going through. It's very frustrating isn't it? I'm sorry you're going through this too but, at least we're not alone. PTSD sucks!
I wish you the best in getting through this. Hopefully we'll both get some good advice from this post.
Take care of yourself and don't give up!
Morgan