Hi mama! Alam ko yan ang nakakaabala talaga, lalo na pag hindi mo sure ano ang cause. Please see your doctor soon or go to the ER if the pain gets worse or you feel dizzy, mas better safe than sorry, especially pag may pelvic pain involved. Could be maraming reasons, kaya kailangan talaga ng proper check-up para malaman exactly kung ano. A few of my mum friends had similar tummy pains and turned out need lang ng professional evaluation, so don't worry pero go have it checked. Take care, mama!