Hello Mike:

Don't over re-act. It just may be possible that the screw that holds the wiper arm down and in place has come loose and the pressure put on the arm has caused it to slip a notch or two. 

Pop off the plastic cap at the base of the wiper arm which will expose the nut that holds the arm in place. Take the nut oft, fold the arm toward yourself and remove it from it's base, it will probably take a little jiggling.  Reinstall it to align it with the other arm and put it all back in place..  :-)

regards.
clarence.