Contraction? Or something else ?

With my first i never experienced real contractions with the really bad pain. They just felt like period cramps I didn’t know I was in labor till my husband convinced me to go to the Hospital and it turned out I was 8cm and had my son 40 min later.

So this time around I’m trying to pay more attention to my body.

So I’ve been having tightness in my belly with some cramping like 10% in my back and the rest in the front. But every 10 or so minutes. I’m 35 weeks btw. So idk if I should phone my dr. Or wait it out more?