Sayang, belly pain is quite common in pregnancy, tapi sebab you're getting close to your due date on 20/4, better check with your doctor or midwife just to be safe, could be Braxton Hicks, ligament stretching, or something else they need to monitor. A few of my mum friends had tummy aches near their due date and turned out okay, but each pregnancy is different, so jangan risk it lah!