Light contractions?

☀️Katelyn☀️ • 👦🏼 Elijah David ~ 👶🏼 Sebastian Joel

FTM so I have no idea what to expect, I haven’t had any pains or anything this pregnancy, so the feeling I’m getting is completely new. But basically, it’s like a tightening in the bottom of my stomach, and I have an ache in the bottom of my stomach and in my butt, would this be a contraction or just a pregnancy pain I’m just now experiencing. I am 36 weeks