possible implantation?

justine

AF is due thursday 7/18. this morning i used the bathroom and had some pink blood when i wiped. i assumed it was my period, so i put a tampon in, but it was very painful and felt dry. when i took it out there was only a little bit of pink on it and now i’m not bleeding at all anymore...is today too late for implantation if i’m 11DPO and period due on thursday!?