Carrying low at 29 weeks

I’m 29 weeks today and I’ve noticed my belly looks a bit lower than it was. All through my pregnancy I was carrying low but near 18/19/20 weeks it felt lower and I started to get bad lightning crotch and constant pelvic pain and feels like I have to pee all the time and I’m constantly short of breath. I was wondering if this is an indicator that he might come early or what? My sister had a boy too but her belly was a lot higher than mine