BH or baby movement?

This is my second pregnancy and I’m wondering if anyone is getting a generalized tightening in their abdomen? Mine keeps happening fairly low (midway between my pelvis and belly button) but my fundal height is measuring just above my belly button as of Tuesday.

I have been feeling other bubbles/thumps for a few weeks but these episodes last several minutes and happen a few times a day. It’s not painful, but it does feel a bit like involuntary planks or crunches.

I don’t remember having Braxton Hicks last time although I know they begin in the first trimester so I do t have much to compare it to.

I just saw my midwife Tuesday and little man is measuring on schedule and heart rate is excellent so I’m truly not worried anything is WRONG, I’m just trying to figure out WTF I’m feeling 😂