Confused

Aury

I know it might be stupid but still, I have had like 4 ultrasound and my due date was always 4/14, last ultrasound which was at 20 weeks I get the ultrasound pics like they always do, I get home and notice that the pic at the very top say that my due date is 4/18, but the doctor didn’t say anything to me about moving my due day.

I know is just 4 day difference but I’m just confused as to why no letting me know and also why the change all of the sudden? 🤔🤷🏽‍♀️. Again i know it might sound stupid to you but just needed to see if anyone has had this happen to them as well?.