If you have it out of the case, look at the hairsprings and pivots at the pivots of the needle. One of two things may have happened when the glass was loose. The hairspring may have jumped a coil or the needle was knocked out of it's pivot.
If it's the coil use something non-magnetic & make it hop back, I use a toothpick or bamboo skewer. It is a very delicate spring & I think one of the most difficult items to get right.(my hands shake a lot) I rest the point on something solid for support.
If it's actually out of the pivot you may be able to pop it back in by putting a light outward presur on the pivot point & maneuver ing the needle back in place. It's easier than dealing with the hairspring.