I have a sharp pain in the back of head behind my ear on both sides - when I touch there it feels sensitive I have been feeling this off and on about 2 to 3 weeks. I went to the urgent care -- he gave a antihisamine and antiobotic said there was conjestion, I feel no different. My sinus would not drain when I would do the routine in the pass to get them to drain like saline, hot shower, vicks, heating pad and enema. This morning they did drain after the shower, but now the feeling is coming back -- my head feels sore and like its swelling. Can you help? Thanks.