Okay now I'm confused....

Nakita • 30 years old, Married Baby 1- June 2015, Baby 2- October 2016, Baby 3- March 2018! Baby 4 October 2019

my original due date was March 23rd. I've been steadily measuring 2-3 weeks bigger. My Dr informed me that they have my due date as April 2nd!!! what in the heck am I suppose to go by 😭😭😭