Eh, I hate how dreams can make you feel bad even after your done sleeping, I have experienced this same sort of uncomfortable feelings after a dream. Have you discussed these dreams with a Doc or anything? What I've learned about dreams and sleep is that dreams are second long visions in your mind, and they appear in deep sleep. Well if your asleep, but not in deep sleep, and you are aware of your mind and dreams then some how control your dream. I have done this many times and have discovered it helps big time.

I used to have dreams about being abandoned and left to die, I then decided I wanted to control this dream in my lesser sleep and changed the outcome. I've never had that dream again.

I'd give it a try and see what happens.