Uy, ang hip/back pain na yan during late pregnancy ay super common talaga, kasi lumalaki na ang baby at shifting ang posture mo, pero I get it, nakakaaalahanin lalo na pag masakit! A few of us moms noticed na worse ito pag prolonged standing or sitting lang, so try changing positions often and maybe prenatal stretches if kaya mo. Since wala pa naman kang unusual discharge or other signs like consistent contractions, I'd still suggest checking with your OB just to be sure and para peace of mind mo na rin, especially pag tumaas ang intensity ng pain. Take care, mommy!