Uy, normal yan sa pregnancy, lalo na ngayon na lumaki na ang baby mo! Marami sa amin na preggy felt the same thing, parang may pressure or naiipit talaga especially sa puwet at sides, kaya don't worry. It's usually just the weight ng baby and ligaments stretching, pero since you're feeling it on both sides, mas better na itanong mo sa OB mo next visit para sure lang, baka may alignment issue or something na kailangan i-address. In the meantime, try pacing yourself, take breaks when sitting, at baka maghelp din ng matress pad para sa support pag natutulog ka. You're almost halfway there, mama!