Nervous about baby’s position?

Anyone else nervous that their baby may be breeched or not head down? I’m almost 31 weeks & every day I get nervous of this, because i feel a lot of movement down by my hips & pelvis & rarely by my ribs or anything high up. I had an ultrasound at 28 weeks and baby was head down. Ultrasound tech said by then they usually stay head down, but I know some don’t. It’s making me nervous!