Due date wrong!

Nikki • 22. Pregnant with my first child and it's a GIRL!!! can't wait 💖 July 22 come sooner!
So I just realized I think my doctor got my due date wrong...the first day of my last menstrual was October 8th..so my due date should be July 14th correct? Instead my doctor told me it's July 22. Lol maybe I told him the wrong date haha...