Yep, I agree. Sounds exactly like hiccups. Especially if they are in rhythm.
Hiccups! Mine get em daily
Could it be hiccups? If the baby had turned head down already that would explain it.
Also, I swear my little guy punches my cervix - or maybe he head-butts it because sometimes I feel a sharp pain down there. Asked my Dr about it and he said it was harmless...but you can always call yours if you are concerned.