Do you have an ahead stem? If so then the steerer may have slipped round inside the stem and you just need to loosen off the headset, hold the wheel in between your legs and twist the handlebars back round into line. This happened to my front wheel after a crash once.
Do you have an ahead stem? If so then the steerer may have slipped round inside the stem and you just need to loosen off the headset, hold the wheel in between your legs and twist the handlebars back round into line. This happened to my front wheel after a crash once.