It's weird it like lower back top if the bum like my bone literally came out and then moved somewhere else and causes me pain
If it continues go to the cz i had bk pains for 2 days and thanksgiving it got worse, iT turn out i was having real contraction and they gave me 3 bags of fluid to stopt it. I was only 22weeks
Hip or lower back probably just try to relax I'm sure all is fine