Please tell me can getting hit above your eye cause droopy eyelid?

Droopy eyelid. There are several causes of a droopy eyelid. Your best bet would be to have your eyes evaluated by a board certified facial plastic surgeon.
Drooping eyelid. Trauma around the eyes can cause a drooping eyelids. However there can be many causes for drooping lids. If you have a drooping lid following trauma I strongly suggest that you be evaluated by an expert to determine why you that is drooping.