Hey mama, normal lang yan at common sa pregnancy talaga, parang stretching ng ligaments and everything adjusting sa baby, kaya medyo nakakasakit, but better mag-check with your OB just to be sure it's not something else, lalo na kung sobrang sakit or may spotting pa, okay? A few of my mum friends had the same thing around that time and normal lang talaga sa kanila, pero peace of mind is worth the visit sa doctor talaga! Stay hydrated and rest when you can.