Uy, ang iron supplements talaga ang culprit dito, kaya ka hindi nag-iisa! A few of us had the same issue during pregnancy, nakaka-stress talaga lalo na first time mom ka pa, but there are things that help. Try drinking lots and lots of water (seryoso talaga, liters a day), eat fiber-rich foods like fruits, veggies, and oatmeal, and mag-move around rin (kahit just a walk around the house helps), kasi the iron can really slow things down. One of my mum friends swore na pag nag-take siya every other day instead of daily, mas okay na, but definitely ask your OB about that muna, some doctors adjust the dose or brand kung sobrang hirap. Don't worry, it gets better once your body adjusts, pero if it's really painful or concerning ka na talaga, check in with your doctor lang para sure everything's okay!