You need to talk with a counsler. It has been over 15 years since a tractor trailer ran over top my car. It took a year or so to stop those day time visions and night dreams. If I had not done some visits I would not be able to get in a car again. It took hypnosis for me.
I am seeing a counselor about the recurring dreams and she has got me doing all types of things to help try and alleviate the problem. I think the woman that hit me was texting or looking at a GPS system, because she clearly did not see me. One if the things suggested to me, was to try and change the outcome of the dream. So before sleep, I picture at the end of the dream she drives on past me instead of turning into my lane and hitting me. It's not working yet.
I had 4 months of untreated facial nerve pain before my TN was diagnosed. I would drug my self with nearly dangerous levels and mixes of pain meds, sleep for 3-5 hours and wake up to my own screaming. The pain was that bad and it was 24/7. So, when I got treatment after diagnosis I thought that would be the end. But shortly after I started sleeping through the night I started having "painful" dreams. Not just of my face pain, but dreams that all the skin was being peeled from my hand, and I could feel it, or I dreamed I was walking through a garden and vines with hypodermic sized needles wrapped my legs poking clear through, I could feel it. I was waking up screaming again. But as soon as I woke up the phantom pains were gone. I had to go to a counselor and talk it out and keep a dream journal. I think I needed time to work through the fear and anger that months of pure agony had left me. Eventually the dreams stopped. My dreams are quite different but seeing a therapist about possible PTSD symptoms is my best recomondation.
I have PTSD, causing depression and anxiety. I have dreams of the situation that caused PTSD at times I awake and think im still there. I have to look around and realize it was just a dream. Its been over 10 years. I dont have these dreams every night just periodically. don't have specific medication. However, I was recommended counselling and giving anxiety medication. I would think that counseling may help. Sorry about your accident.