Birthing Ball

There's no graceful way to ask this question so I'll just go: the past two days I've been bouncing on my birthing ball and I've gotten a few cramps (which I'm guessing might be contractions) but at the same time it just feels like I have to poop? Could it be contractions or is baby not the only thing that can 'drop'? Aka...can it make me have to poop? Sorry this sounds so stupid