Good evening! Girls, could you please tell me I'm in my 38th week and…

Good evening! Girls, could you please tell me I'm in my 38th week and pains started! Sometimes it hurts, sometimes it lets go of the lower abdomen, there's a feeling like colic or something is pulling down from below and shoots pain! What does this mean?! Training contractions?! I had a check-up with a doctor, everything's fine, the belly dropped ?