I had sexual intercourse on 25th september, Since it was unprotected i took ipill within an hour. My period was due on 28th september. I did beta hcg on 28th september and it was negative. I have PCOD problem so my periods are always late. Today that is on 10th october i had some bleeding not full like a period but red in color with clots however the flow is less. I wanted to know could it be implantion bleeding? or my period. Please explain! as i think pregnancy is not possible since it was my safe period and i also took ipill