I have had same problem, but it has been going on 1 year, off and on. Usually comes for 4-5 weeks then goes away for a month or 2. This time it has lasted about 7 weeks! They were thinking it was Trigeminal Neuralgia, but I have no tingling... and it is not sensitive to touch, it actually feels better to hold it or apply pressure or ice.
I think it is a result of having had Shingles without realizing it cause I had NO rash, so it's damage of the facial nerve I think...