Ay, anak, with tummy pain at delayed period, kailangan mo talaga mag-check sa doctor or clinic ASAP, hindi safe mag-assume lang, lalo na kung irregular ka na normally. A few of us moms, pag ganyan nararamdaman, kinekeeper namin ng close but we always went in to rule out anything serious, kasi it could be many things and only a proper check-up can tell. Magsched ka na ng appointment, ha? Take care, at luwas ang puso mo soon.