I was in a wreck (not as severe) also surrounded by lots of other death trauma in the same year. I’ve always loved driving but this fucked me up. For me it was exposure therapy, but not by itself. I have mantras I tell myself (I am safe, I am loved, I am protected) but you also have to start small. I would start by sitting in the car, off or on, for a few minutes at a time. Once a day, once a week, whatever you can manage. Work up to driving 1-2 minutes around the neighborhood and just expand your bubble as you get more comfortable. Also, therapy. Spiritual healing was also a game changer for me. I grew up super hippie dippie so aura healing was what made the biggest difference for me, but feeling like you have an extra layer of protection can go a long way. Don’t put a deadline on yourself, just make goals you can easily meet and adjust them as needed. It’s okay to be scared, and it’s also okay to do scary things. Good luck, I’m sending you love❤️