I had a similar experience a few years ago now. In my case, I was recovering from an overdose & I had extremely vivid & disturbing dreams. Each time I would wake up, I would dread going back to sleep. And when I did, I would have another variation on the same dream all over again. So I have some idea of what you're experiencing. I wish I had some suggestions to offer as to how to overcome this. I'm afraid I don't. But I just wanted to say I hope this episode passes for you as soon as possible.