Is this normal in pregnancy ?

Doctor wasn’t too worried. Last week I had a ultrasound at 36 weeks because my belly was measuring behind. Now I am 37 weeks and at my appointment my belly is still measuring behind and was measuring 34 weeks. Baby’s heart rate was a little low at 120. They monitored me because I have been feeling less kicks/ movements as well. Heart rate stayed between 116-120 and only had one contraction while being monitored. They did give me cold water half way into being monitored to get the baby moving. Even after that they came and checked and said let’s monitor you for 5 more minutes and then after that they said you are fine and baby is fine and sent me home. Should I be worried if the doctor wasn’t?