Pulse in stomach?

I’ll be 36 weeks tomorrow and I’ve noticed a pulse or something in my stomach. It’s so weird, I can even see it. I don’t think it’s baby it’s different.. my mom even saw and felt it. Doesn’t hurt or anything I just find it weird.. could this be my own heartbeat I’m noticing? Doesn’t happen a lot but I have noticed it before.. Baby is moving fine and i just left ER to check on her a few days ago this has been seen before this though so I don’t think it’s baby. Anyone else experience this?