Baby grinding into hip bone

Shelly • Mama to 👦🏼 Jesse 6/4/19 & 👶🏻 Jameson 3/11/22

Anyone else experiencing this? I’m trying to figure out what body part he’s using 😳. I’m 35&1/2 weeks and he’s been head down for awhile, but a few times a day he’ll grind really hard against my left hip bone! I don’t know if it’s his head or his shoulder.. or an elbow but it’s powerful. Anyone else?