Nightmares after car accident

Hi, about a month ago I was in a car accident, my car was totaled and the airbags went off. Thank God I only had a minor concussion and a severely sprained ankle. Almost every night I get really bad nightmares replaying what happened. I only started driving a few months ago and am a very cautious driver but this I couldn't help. I don't remember the initial accident but the first thing I remember is looking up and seeing a prayer angel my grandma just bought be a week before, it says 'never drive faster then your guardian angel can fly'. looking up at that I knew I was going to be okay bc God was looking after me. Since then I have been focusing on my practicing my faith but I am still having trouble sleeping. Does anyone have any ideas how to get nightmares to go away.

This is my car, the driver door does not open so I was trapped in the car for a while which doesn't help the nightmares. I am so blessed to be okay with minor injuries, God and my big suv saved me lol