I have been on birth control for 4 months and i started taking my sugar pills for the month on Sunday July 22nd. I had unprotected sex on the 23rd, but my partner pulled out before he came. I usually get my period on the Thursday morning after i start taking the sugar pills, but i just had cramps all day. I didn't see anything until late that night, and it was only brown discharge. When i took out my tampon in the morning there was blood, but also a lot of brown discharge. Could this be my period or implantation bleeding? It was very light discharge all day today and only bled for a few hours tonight. I am confused as to whether this is my actual period or not. Also, i have been working a lot more this month and i hardly have time to eat. Could this affect my period and the flow?