Does your car have a console shifter? If so you probably tweaked the linkage that runs up to the column, roll back under the car and see, you can adjust the linkage up to the column and that should get you back in business. The adjuster is on the bottom of the rod that runs up to the base of the steering column you should be able to see it easy enough from underneath, just use a 1/2 wrench and adjust back to where it starts properly. The switch is adjustable as well but it's on the column and not as easy to get to.
HTH
