I'm 30weeks and my baby is still low. He went up like 3times in my whole prefnancy.
Yes, before 20wks baby is really low, way below your belly button. Throughout 2nd trimester your uterus will start to move up and you'll get a lot of stretching and round ligament pain. You can also get pelvic girdle pain which effects your back and in your groin. No need to worry but if you are or think it's something more then normal don't be afraid to call your dr. Good luck!