hello ive been sick for 5 months now. I had a cat scan of my sinus's and i have a cyst in my sinus cavity, although i do not think that is the problem. I was on a 10 prescription of Doxycyclene and it seemed to help a little and now i am back to square one. My head gets so full and pressured i have extreme headaches. it feels like my head is weighing me down. its hot to the touch and i get so dizzy i can't do anything. i don't know what to do. when this all started happening i would feel very sick after i ate and out of no where i'd throw it back up. please help me. i am 19 years old and i don't know what to do. i went to the hospital and they didnt care to help me at all. I hope you can find an answer for me please