pressure and waddle?

Kendall
So I'm almost 16 weeks and I've popped out of nowhere and now semi look pregnant. Also this week I've had a lot of lower pelvic pressure. It's worse when I move ESP sit down. Almost feels like gas does in the stomach only it's low bikini line and I feel like I'm starting to walk weird not like a wadddle yet but like my hips are moving or something! Anyone else?!