Muscle Spasm/Pull

I’m currently 17 weeks pregnant and lately I have noticed when I consciously relax my stomach a little too fast I feel a muscle pull towards the front of my stomach. Right now I finished cooking and did the stomach release (I am constantly sucking in and contracting my abdomen it’s a habit that’s hard to quit even while pregnant) this time the muscle release hurt to the point where it also felt like a sudden baby kick but obviously my baby is too small to be giving me sharp jabs. Now that same spot has been feeling a little discomforting. Has anyone experienced this before?