Could this be a early sign?

My tailbone has been killing me. It feels bruised and hurts so bad if I even sit for like 5 min. Just sitting down hurts and then its sore for a while. I wince getting up. Plus I just feel like my bladder is full alot more often. Like I'll pee and go pee again 20 min later. But honeslty this tailbone thing just is bothering me and I've never had this happened to be before it's been going on a few days now and weve been ttc for 2.5 years so wonder if anyone had tailbone pain while pregnant ?