I'm so lost with the whole implantation bleeding thing.... how do I know that's what it is? Hubby and I were TTC but decided to take a break bc I put on weight. Last month we BD around the fertile window just bc we were in the mood, thought nothing would happen like always and now my period is 1 week early. IT HASNT BEEN EARLY FOR OVER A YEAR! mostly late or on time (35 day cycle)