so I had sex on july 8th. the next day I took plan b AND I also got the birthcontrol shot. my periodn usually comes around the 20th and the whole month of july, there was no sign of my period. I took two pregnancy tests and both came back negative. so my period came yesterday. I was not at home so I used toilet paper. when I got home I put on a pad and fell asleep. when I woke up I went to change my pad and there was no blood at all. there was a tiny amount but it was more brown than red? i have cramps and everything. what could this mean? I'm so confused. please help!