Winter car prep scenario

[Hexyprep]

You are driving home late at night in winter maybe it's midnight. It's very cold and icy and you are on the backroads. You hit a patch of ice, your car goes over on it's side and into a ditch. You don't have your phone with you or the battery is dead. You know you are at least a mile from any life, and when you try to stand you realise you have injured your leg, there is some torn flesh and some blood but its not life threatening. however you wouldn't be able to walk any distance.
Its a very quiet road at the best of times. Maybe you have managed to push the car back onto its wheels, but the front end is smashed up and its not going to be going anywhere. You realise you may well be there for the night. So what do you do? What preps do you have? Are you going to get through a freezing cold night in your car? Can you treat your wound?