Period like cramps before labor starting?

Bre

I’m 39 weeks today, about 1cm dilated and 40% effaced.

I went into labor and delivery two nights ago to check amniotic fluid bc I thought my water bag was leaking.

I did some walking yesterday and last night I started having period like cramps in my vaginal area. Has anyone experienced this before labor?

I’m due on November 23rd.