Bizarre and intense dreams

Is anyone else getting anxious dreams and nightmares? Always been an anxious person but very relaxed with my partner and happiest I’ve been in years, over this last year.. but my dreams are nightmares.. I think I’m processing a lot as I used to take drugs and binge drink and 3 months before I got pregnant I stopped everything and choose to be sober- which has been amazing- and for the record I never want to go back. Trying to figure out if the dreams are a symptom of pregnancy or dealing with the trauma of my old party lifestyle ?