I m 16 I m on birth control but I took an antibiotic about 2 weeks before my period started and I had sex with my boyfriend two days after my period ended and he cummed in me.  My period came late and only lasted 2 days and on the 3rd day it was a brown color, I started my period on 9/11 in the evening and it ended on 9/13 in the morning. I am very nervous because I ve been having really bad nausea, headaches, backaches, peeing more than usual, I sleep a lot more than I normally do, shortness of breath, sore breasts, cramping, bloating also I get dizzy a lot and I m not expecting my period for another 2-3 weeks. Someone please help and please dont be mean.