a month and a half ago, It was black friday I went out with my friends to find good deals on electronics. When I came home I threw up twice and immediately noticed pressure in my head, It increases over time and the doctor gave me some antibiotics. Most of the pressure in my head went away, but some still remained, around this time I started having pressure around my nose. I went back to the doctor and he gave me a nasal steroid.  I have been taking it for 2 weeks. For the longest time I thought it was sinus related but it is not. I had a x-ray done and nothing came up, I showed it to the ENT and he said nothing is wrong with my sinuses. Please help, I feel out of it. I have never had this happen to me. I remember a period of time, where I would get vertigo.  Still have pressure in the side of the head, and behind my ears, sometimes I get naseau at night, It came back a few nights ago when I had some fish. Hard to focus with my eyes. WHAT COULD THIS POSSIBLE BE?