Oo naman, normal yan sa pregnancy, ang ligaments natin nagiging mas flexible dahil sa hormones, at kahit maliit pa ang baby, ang posture natin na nagbabago na talaga, kaya sumasakit ang likod! A few of us moms noticed it starting around 10-12 weeks pa lang, and one of my friends said hers got worse after she finished antibiotics kasi stressed out ang body niya. That said, para sa peace of mind mo, I'd really suggest checking with your OB about it, especially since you just finished the Cefuroxime, para ma-rule out if connected pa rin sa UTI or if kailangan mo ng support like prenatal stretches or a maternity belt. Hugs, alis-alis lang ang worry mo once ma-confirm ng doctor na lahat okay!