Baby's head just above pubic bone?

Ash • Married 8.2.2014. 1st Boy 11.24.16. 2nd Boy 8.27.18
I can feel my baby's head and movement right above my pubic bone. I catch myself waddling sometimes because I feel like I have a baseball in my vagina. I'm 31 weeks. Is this normal? I knows he's head down and engaged but literally he is as low as he can get without coming out. Normal or is this a sign of early labor? I'm a first timer so I have no idea. I just know it's super uncomfortable! Lol