Fear Of Death

Since I crashed my car, a month after passing my driving test, I haven't been the same, I hate going out just in case something happens and I don't come home, I don't sleep because I feel like I won't wake up the next day. I can't get on the bus, or in a car since I crashed, I've stopped living since then, I'm just existing. I used to be a social butterfly, I loved going out, I loved seeing my friends, and going on road trips, now I can't leave the house. I don't know where to find help, my family don't understand and neither do doctors.