Eh, at 31 weeks keputihan banyak tu memang common lah, tapi bagus jugak doc dah check sebab sakit perut berulang-ulang tu kena monitor, a few of us had similar experiences dan doc kami cakap kena pastikan tak ada signs of infection or premature labour. The keputihan increased during pregnancy is normal, tapi kena make sure clear/white je, not greenish or dengan bau pelik, okay? Since doc dah examine you already, baik follow up je with your doc if the pain continues atau if the keputihan changes colour/smell, just to be safe lah.