Sharp abdominal pains

Suz
I am almost 24 weeks with my twins. I started having this stabbing, sudden pain in the middle of my pelvis area, I thought whenever I bent down. Now I've had it several times standing up or sitting. It kind of scares me yo have such pain, I've never had that with previous pregnancies. It hurts so bad that I usually cry out or say ouch! My mom suggested it was a baby kicking, and I read about babies bumping the cervix being painful. The fact it happens randomly sometimes makes me think baby, what do you think?