Period or implantation?

Calli
My DH and I have been ttc recently. I'm suppose to start my period today. When my period comes, it starts early in the morning. I woke up having cramps thinking I started but there is no blood. I know this is tmi. I've been having cramps all morning and still haven't gotten my period. I just don't know if it's possible if implantation can happen around the start of your period.