I'm right there with you. I just had my 21 week scan and my little boy is breech. He's just been kicking up a storm in my crotch LoL. They still have lots of room to move around. Don't worry, he will change position and you will feel it in other places besides just down there :)
My son was low early also, but he stayed full term.
My lil girl stay low and I'm 23 weeks. But she moves around