Quote Originally Posted by DebW
Not sure what you mean by "twisted headset", but the most likely thing is that the handlebar stem got skewed relative to the headset. If so, just loosen the stem bolt, align the handlebars, and retighten.
I should add that if you go to realign the handlebars and loosen the stem bolt, you may find that the stem doesn't loosen but the bolt sticks up above the stem. If this is the case, take a hammer or mallet and tap the bolt so that if fall down flush into the stem. Now the stem will be loose and you can realign it. The lug at the bottom of the stem will often stick in place without a little persuasion.