for the past 2 1/2 weeks i have been feeling nauseous, i threw up once about a week and a half ago, and i have had a head ache my lower back hurts my ribs hurt really bad, i did start my period, but i am on birth control, but when i had sex i wasnt taking it right, i was wondering if i was pregnant dont know if ne one can help me... and if im not pregnant can someone please tell me what might be wrong with me.. also i got the H1N1 nasal spray which has the alive virus in it but its only supposed to last a coupe days i got it a week and a half ago.. please help me