Ay, nakakagulat talaga pag ganyan, pero tummy aches during pregnancy ay common talaga, mga kaibigan ko mostly naka-experience din, especially as baby grows at lumalaki yung uterus, kaya nag-stretch ang lahat, lalo na pag gumagalaw ka or nag-exercise. That said, para sa peace of mind mo, mas maganda talaga na i-check mo with your OB kung may pattern ba or kung may iba pang symptoms like spotting or fever, better safe than sorry, diba? Sending you hugs, mommy!