Pinching?

Rachael • I'm a 34 year old RN and mother of three (soon to be four). Kinda feel like a 1st time mom, since my youngest is 12!
I feel like she's pinching me. It switches from left to right side. But always in the lower abdomen. I don't remember these feelings from my other kids. Not contractions, it's pretty quick, just a couple seconds. But happens pretty regularly, then goes away for a few days. Any ideas?