Pregnancy signs while ebf?

I'm currently 10 weeks pp and ebf my little boy. For a few weeks i gave him bottles (milk i pumped earlier that day) at night so his dad could help out and i could sleep. I stopped that though because pumping is a pain in the butt, now I just bf him 24/7.

Anyway, we've been having unprotected sex a LOT since my 6 week checkup. I've been cramping, and this morning i had some light pink spotting. Could i be pregnant or is this normal for bf pp hormones?