Please help

AT

This is my first baby and I have no idea what labour is supposed to feel like. I used to have painful Braxton hicks but then they stopped now my stomach just tightens to the point that it's uncomfortable. Yesterday I started having really bad back pains that don't last that long but they're so intense that I can't move when they're happening. Plus I've been having pelvic pain/pressure for weeks. Does that sound like labour has started I'm 39+1?