HELP QUESTION!!!!!!!! 10POINTS?

Ok i have had the swine flu already and then that was a long time ago, so now my head has been killing me all day so i got checked out of school and so i threw up and put a wet towel on my head and rested for like 4 hours and woke up and watched tv now my head is still killing me and i have been drinking plenty of water and took Tylenol and it has not been working (i took one during lunch and when i woke up) so how do i get rid of a head ache and why is it still acuring on me right now?!?