The first day of my last period was Sept. 23rd. My next period is due on about Oct 21st. I had unprotected sexual intercourse on October 2nd. The next day, Oct. 3rd, I took the ECP Next Choice. As of thre days ago (Oct. 11) I have experienced light bleeding. It has been very bright, red blood and is enough to fill one sanitary napkin, or a few panty liners, per dayy, unlike my normal periods which are heavy. It is thin in quality compared to my normal periods, but still has a flow. I also have cramps. Could this be because of implantation bleeding, or side effects to the ECP? I will test in about a week to get accurate results but I'd still like some insight and personal experiences if possible. Please and thank you :)