The main thing is your ok.

If it was a low speed off I would not be that worried. But for piece of mind you could take it to a garage / tyre shop that has laser wheel alignment, tell them what happened and get them to check it out.

http://www.maxmoto.co.uk/lasertrack.shtml I had my FJ tested on the same kit this company uses and found my wheels to be out of alignment but the frame fine this was fine after a 50MPH slide down the road.