Sayang, abdominal pain during pregnancy kena check dengan doctor, especially kalau ada constipation atau if it's severe. Jangan delay, go see your OB or pergi emergency room kalau sakitnya teruk or ada spotting/bleeding, okay? Constipation memang common masa pregnant, tapi doctor kena assess dulu to be safe. A few of my mum friends had similar issues mid-pregnancy and turned out fine after doctor checked, but better safe than sorry lah. Jangan self-treat dulu.