pls visit the gynea if you're worried. i had a very mild period like cramps at 35+weeks which lasted for about 4hrs (each pain last about few seconds) no bleeding or spottings at all. but at that point i notice bb isnt moving as strong which some may say due to space constraint as bb gets closer to birth.lucky i dint take the risk. went to the hospital & found out i was having a placental abruption (unfortunately the waterbag was filled with some blood hence i hv no V-bleeding & bb accidentally consumed) which requires emergency csect.