I would go to your doctor as there are a variety of causes. I have cold sores that now follow the tracts of my trigeminal nerve which leads to my eyes, cheek and mouth area feeling numb. Someday I worry that it lead to full blown Bell's Palsy. I am not saying this is your case; but with your symptoms it sounds like something is affecting your nerve tracts.
I would see a physician as soon as possible. It is probably nothing, but, when numbness is involved, it is best to have the issue looked in to.