I Am Getting Pain Along The Top Row Of Teeth

I am getting pain along the top row of teeth only. Had a check-up at the dentist a couple of weeks ago and he said all ok. But for about 10 days I am getting this pain but not all the time some times when I eat and when I lay my hear on the pillow it comes and goes. Plase can you tell me what it is. I have put senceadine toothpaste helps for a little while.