I know how you feel angelgirl. My anxiety would wake me up out of a sound sleep for months until I could no longer sleep at at as I accosicated my panic attacks with the night. This made me more exhausted and actually worse off.
I t took me months to get bak to a normal schedule, so I know how difficult and anxious this situation is for you.
I agree with gardengirl. I understand these nightmares are very painful and frightning to you but I think if you try to process them while you are awake it might take some of the intensity out of them.
My T always tells me that if I face my fears head on and deal with it eventually the fear will become less and less to where I am no longer afraid. I'm still working on that one. I have lots of fears I'm still dealing with.
Anyway, please try to rest as much as you can, even if it's only and hour here and there so your not so exhausted it effects you in other ways. Maybe lay down and set your alarm clock for two hours and slowly increase it until your feeling more comfortable.

I dunno...just a thought. Take care angel. I will be thinking of you with good thoughts.