I was driving last night coming home from work and it was snowing out and i was making a right turn and skidded and hit the median. i broke a piece of my rim off and so i got the car off the curb and put on the spare. when i was driving home the car kept wanting to go to the right really bad i had really easy steering but i had to hold it to the left like 45 degrees more than straight to keep the car going straight.if anyone knows what might be wrong please help!!???

Take it to an alignmnet shop and have it looked at.

If the spare that you put on is a donut as they usually are, the outside diameter of the tire is signifitantly smaller than the stock tire which would cause the steering wheel to be off to the opposite side of the car as the spare. Also if you put it on the front, it would try to pull the car to the side that the spare is on. This could also destroy your differential inside your transmission so I would put the spare on the rear. That should straighten out the steering wheel as well as it will save costly transmission repair or replacement. But you should replace the full sized wheel asap.