Nightmares

I am going to need a little help on this one. When I was pregnant with Brett I started have chronic nightmares. That went on for about a month, until I asked my Bishop and Jon to give me a blessing. Thankfully they stopped. Unfortunately the two weeks they have come back again. Last nights nightmare was pretty graphic. I literally woke up praying that this particular nightmare would stop. The only difference between this set of nightmares and the set that I had when I was pregnant, it that some of my nightmares are not really nightmares. Some of them are just about things that if it happened in real life would stress me out. So then I am not resting because I am stressed out in my dreams. Does anyone know anything about nightmares, or why I could be having them all of the time? Does anyone else have this problem? I am going to try to do a little research myself. I'll let you know what I find.