Overcoming bad feelings?

What does one do when all they feel is dread and pain from past trauma? Paranoia even. My birthday is a week away and I feel like crap all of the sudden. Maybe it's my over thinking bringing me back to the past. But I can't help it, I've been hurt before and these feelings hold me back. I just wish they would go away and never come back. I wish my mind and heart were happy, not being tormented by pain and paranoia. Not being able to mentally get away from the past when all I want to do is live in the present. My life is okay now and sometimes even happy. But I want it to be more than okay and I find it hard moving on when my own mind is a prison. Maybe a good night's rest will help, that's all I can really ask for.