Have you considered starting a dream journal? When I was getting PTSD dreams it really helped to keep a little journal and pen by the bed and write down everything you can remember as soon as you wake up. Also, doing a little meditation before bed should help (you can also smell a lavender essential oil, drink some chamomile tea, and try to distance yourself from technology or any stimulating/scary books or content for at least a half hour to an hour before bed). Lastly, having sugar close to bedtime can be a big trigger for nightmares—I continue to learn this the hard way from time to time but I intimately know this to be true! Eating in general after dinner can create some digestive/mental issues (the brain/gut connection is real and our tummies need rest time to process everything just as our brains do, and digestion of food takes a lot of physical energy), but sugar close to bedtime will especially lend itself to unpleasant dreams and maybe some tummy problems too. Hope these dreams get better for you and that you get all the rest and peace you deserve.