What did your twins weigh at 35 weeks?

I am so scared I am 35.6 weeks pregnant with twins boys I had a ultrasound at 31 weeks and baby A was 3lbs and 6oz and baby B was 3lbs 8oz well 4 weeks later baby A only gained 9oz and baby B is gaining he is now 4lbs 14oz at 32 weeks I had the shot to help their lungs now my doctor said my c-section has to be done this Thursday at 36 weeks have anyone else had this problem and everything turned out fine and and was their any nicu time?