i am 33 weeks pregnant and my baby is measuring 34 weeks and 3days help?

hi everyone im 33 weeks pregnant i have gestational diabetes so my doctor has me going to a ultrasound every month until my due date is april 07.11 my sugars are ok just my fasting ones are high still so i went to my ultrasound on monday and my baby is measuring at 34 weeks and 3 days and he's weighting at 5lbs and 3oz and lately the passed 2weeks my feet are swollen and my hands stay all day long and when i'm on my feet alot and i sit down and then get up i feel so much pressure down there like his gonna to come out so is the doctor going to change my due date i'm kinda scared of whats going to happen