When I found out I was pregnant I was going by my LMP which said my due date was Feb 9th (ironically that's my twins birthday). However once I went to the 8 and 12 week ultrasounds the techs and docs said charged to Feb 3rd because baby measuring big. So since I've been going on that. Today at my visit the nurse says I'm 31 weeks today when I should be 32 weeks tomorrow. Which would you ladies go off of or have any of you experienced too?