Ugh. That totally sucks. I'm sorry. I have sleep problems but I don't have nightmares, usually. I just wake up every, 1 to 2 hours every night and seldom get any REM sleep. Sometimes I'm sweating and panicked but I don't recall dreams or nightmares.
So, are they crazy dreams or are they real-life worries? Maybe it's stress (which I think is why my sleep is so fragmented). Or, are you on medication or eating something? Like, I can't eat Marie Callender dinners. I swear, every time I do I have the weirdest, grossest, horrible dreams. It took me a while to figure it out but as soon as I stopped, so did the nightmares.