Period pain low down and backache

He

I’m a ftm, 39 weeks tomorrow. Have been having period pain for a week or so now, randomly and it’s always really low down. I had thought Braxton hicks but my stomach doesn’t tighten so I don’t know if that’s what it is or not.

This evening I am having period pain low down and my back is aching as well. Both coming and going but not getting any stronger atm (has been about an hr and a half).

Guessing it’s just part of my body preparing for labour? I’ve not had a bloody show, lost any of my mucus plug or had any water leakage/break.