Ay, marami sa amin na nag-take ng progesterone! A few of my mum friends were prescribed the suppository version first (like what your OB did), tapos after a few months nag-switch sila to oral na, lalo na pag stable na ang pregnancy nila kaya okay lang yan. I'd say follow your OB's instructions talaga since every pregnancy is different, pero if you have concerns about the switch from suppository to oral, definitely ask your doctor about it, they can explain kung bakit nag-adjust siya ng approach para sa'yo kasi basta may specific reason yan usually! Wishing you all the best with your pregnancy!