My boyfriend and I had sex on Friday November 29 which was the day before my period started. I am on the pill and have been taking it on time except that I did miss on but took it the next morning sometime in the middle of November. We did use a condom as well, I did notice however, that the condom was sort of slipping around on him but it didn't rip or fall off during intercourse. My period came on time and was a normal period for me in every way and ended Thursday December 5. Just today I was fingered by my boyfriend and noticed a couple of hours later that I had a tiny smudge of blood come from my vagina. It wasn't dark, just a light pink. He thinks it could be that he might have scraped the inside tissue of my vagina doing this, I'm a little worried it might be inplantation bleeding but it can't be, can it? We hadn't had sex in the entire month of November except that one time and we haven't had intercourse since. Am I overreacting? What could it be?