Aw first time mom, yan talaga common sa 7 months, ang baby lumalaki na kaya mas nakakapag-stretch ng uterus at ligaments mo, especially pag tulog mo sa isang side lang! A few of us moms noticed na kapag nag-left side kami for too long, medyo nakakasakit din kasi biglang tension sa gitna, parang tinitigas talaga; try alternating between left and right, at if kailangan mag-pillow under your bump para mas comfortable. But since it's sharp and persistent, best check with your OB para ma-rule out anything else, could be ligament pain lang talaga (totally normal!), pero mas peace of mind mo if doctor confirms!