I'm so sorry you are going through this. I went through the same thing for a very long time. It may sound strange, but I will tell you what helped me with the dreams. I forced myself to write down every detail of them. It was very hard at first, because all I really wanted to do was forget them, but after awhile, it really helped. I started looking at the events in the dreams in a different light. I was taking every thing literally and that really wasn't the case. What seemed to mean one thing, actually meant something else. It helped me in so many ways. Just something to think about. When it comes to the doors, if they won't let you add a chain, skeksi gave some great advise with the keys, and putting other things in front of the door. If that helps you feel safer, by all means, try it.