Mama, please go see your OB right away or go to emergency if the spotting is heavy or may may cramping pa, this isn't something to wait on, even if it turns out to be nothing! Spotting in the third trimester can happen for different reasons, but honestly, you need your doctor to check you and baby para sure kayo pareho okay. A few of us mums had light spotting late in pregnancy and it was fine, pero iba-iba talaga ang bawat pregnancy, kaya better safe than sorry! Huwag mag-alala masyado, but please get checked today mismo if possible.