Opinions plss

Hey ladies , I was due Oct 29 2017 n was all set to have my precious bundle of love . But to my astonishment , during my recent Ultrasound ,EDD straight went to Nov 14!!!! Pretty confusing . I understand that there could be few days or a week's change of due date coz of my irregular periods but this big change at 36 weeks ??? What do u all reckon ? Would be glad to receive any comments on it. Thanks