Labor?

What does labor actually feel like? What do contractions actually feel like? TMI, but a couple hours ago I had a few orgasms, and I was kind of in a weird arching position for the duration of it. Ever since, it’s like my torso muscles feel weird. My lower back aches and feels tight. I’m kind of nauseous. I have felt a little crampy I guess. Is this something to call about, or should I wait, like it’s just my muscles having gone through some strain earlier? A little bit of a workout I guess for them? Can you trigger labor through orgasm? I’m 29+2 so if this is preterm labor it’s definitely something I need to do something about.