Mild cramps/39 weeks

I turned 39 weeks today. Got checked yesterday , 1 cm 80% effaced.

Been having bloody show since, less discharge more of dark brown blood.

Today at 3 pm, I started feeling pressure and mild period cramps that were controllable, I used to get this feeling a day or two before my period. It’s 1139 pm and the same feeling as been since 3. I feel rectal pressure. Pain is worse when I stand. So far I had 2 episodes of shooting cramping pain in my lower abdomen, probably about a minute they last. Are these considered mild contractions ?

Is this the start of labor?