Hiccups?

I’m 21 weeks exactly and I still haven’t felt baby move too strongly because I have an anterior placenta. But today about an hour after I ate, I was laying on my side in bed and kept feeling these little pokes in my belly.

They had a rhythm to them so I thought it could be baby having the hiccups. Isn’t it too early to feel with an anterior placenta? She’s my first baby. Or am I actually feeling my baby hiccup?

I don’t feel her to strongly but if I’m laying on my side I can feel her low in my abdomen or on my sides.