Aayyy sis, that sounds like it could be nerve-related or maybe ligament strain, pero honestly kailangan mo talaga ng checkup with your OB or doctor para sure, some of my mum friends had similar pain during pregnancy or postpartum and it turned out to be different things like SPD or nerve compression, so better get it checked properly kasi you deserve to feel okay! In the meantime, try not to make sudden movements, and maybe apply a warm compress if it helps, pero please don't wait too long getting that looked at ha.