Talk to Gynecologist on Confused About Weeks And Months

Hey doctors! Am very much confused with the OB/Gynae am consulting with, according to the baby’s growth its my eight month going 33weeks 0day as per today’s ultrasound 19-09-2022. Its my first pregnancy and i know nothing about weeks and months, i asked her which month is it going and she said eight will begin on 26th date and your EDD is 26th November whereas the ultrasound and scans show 12th November. Can anybody guide me like what should i do. JazakAllah