Try writing in a journal every time you have these dreams, and also focus on the stress you may have dealt with that day. Also, look up something called Image Rehearsal Therapy, or IRT. A Psychologist can possibly help you with this as well. IRT can help you deal with reoccurring nightmares.

It is unfortunate you have to be intoxicated to fall asleep, as this keeps you from sleeping as well as you should. Do you suffer from Anxiety?