Mama, please go see your OB or go to the hospital agad-agad para ma-check. Abdominal pain this late in pregnancy can be something that needs immediate medical attention, and hindi worth the risk to wait. Your doctor needs to assess what's causing it, could be normal Braxton Hicks, could be something else, but you really have to know for sure at this point. Tawagan mo na ang hospital or OB mo ngayon na.