Pain in my side? Help please?

About seven or eight hours ago i got this sharp stabbing pain in my side (maybe an inch above the bellyon on the left sideand is starting to hurt on the right as well). Its not a sharp pain anymore but its still there. I haven't been hungry all day which isn't that starange but its mor so than than it usually is. I've got a really bad head ache (which i took tylenol for) shortly before the pain started , and it has never gone away. I have also been hot all day, but i was at work when it started and everyone was saying it was hot in there. But when i get hot i get dizzy and have almost ped out a couple times. Im not as hot any more but still dizzy with my head and side hurting. Im almost seventeen and no people its not cramps. I know the difference. HELP?