my boyfriend and i have had both protected and unprotected sex. I've been on the pill, and within the past month i've missed two pills. This past wednesday i had (what seemed like) my period, however, it was lighter bleeding, about 2 days. From what i've read from other articles, it should take 6-12 days after having sex that this should happen, however it's been longer than that since my boyfriend and i last had sex. I'm not sure if this is just a shorter period due to being extremely stressed out this past month, along with missing the two pills, or if it could actually be implantation bleeding. I took two pregnancy tests before wednesday that came out negative, and took one on saturday, that came out negative as well. Any opinions would be greatly appreciated.