Hello girls! My due date is 31 weeks according to ultrasound. I'm work…

Hello girls! My due date is 31 weeks according to ultrasound. I'm working but it's getting hard to go to work anymore... But my gynecologist says based on the calendar, they put your period in account. On the computer, 28 weeks is included, so for two weeks you will be working maternity leave, you can talk about that later. Well, my last period was April 1st to April 4th. I don't know, but I don't want to work another two weeks, but I have to... Did you also experience this? I'm just having my first pregnancy and I'm really waiting for the baby, now I have a huge question what is my actual