Implantation or Period?

Okay, so for the past couple of weeks my boyfriend and I have been having sex and just not caring (if you get what I’m saying). So I have been cramping but it’s nothing like period cramp. My period cramp will have me on the floor can’t walk. This cramp I’m having is really light. Even with my flow, I’m not flowing at all. I only see something when I wipe and it’s really, really light colored almost pink. Normally my cycle would be a huge mess. Now I’m like confused on whether it’s just a hormone thing or if I’m actually pregnant. I have been having headaches. That’s about it honestly. What do you guys think???