Uy mama, I know it's scary lalo na pag may pain like that! Please go to your OB or nearest hospital right away to get checked, pain and swelling sa pubic area during pregnancy can mean different things, at kailangan talaga ng doctor to make sure both you and baby are okay. Hindi kami pwedeng mag-assume dito, especially pag may discomfort na.
Tungkol sa due date, your OB will settle that for you based on your LMP and ultrasound, usually they use both para ma-confirm. Pero yung pain mo na ngayon, yan ang priority mo talaga, bes. Bilisan mo na, okay? Keep us posted!