GDM- early delivery

Hi mummies. Saya nak tanya sikit bcz just finished my antenatal check up. I have GDM and the doctor said I have to deliver after 37 weeks maximum by 38 weeks the baby should be delivered. Is this common? I’m at 33 weeks now and I have around 4 weeks only more to go. Will I go through c-section if the baby is not born by 38 weeks?