Sis, abdominal pain sa pregnancy can be normal, pero kailangan mo talaga i-check with your OB para malaman kung ano exactly ang cause, better safe than sorry, lalo na ngayon ka na sa third trimester! A few of us moms noticed cramping and stretching pains around this stage, but had to get cleared by our doctors pa rin. Please book an appointment agad, or if it's severe, go to your nearest hospital. Take care of yourself!