Due date changes

Has anyone had their due date changed a bunch this pregnancy? I was originally told I was due August 27, then it became August 21, then it was August 26. I'm type 1 diabetic so they won't let me go passed 39 weeks, which would actually put me having my daughter around August 16 or so 😦 I'm excited that I might get to meet her sooner, but holy cow that seems so much sooner!