This is my third baby, but I’m confused a little about my due date. Today I’m 19 weeks and 1 day. But, I went for my anatomy scan the other day and their papers said I’m due October 21st. If I change my due date to that in any of my <a href="https://play.google.com/store/apps/details?id=com.glow.android.nurture">pregnancy apps</a>, it makes me further along in gestation. At the doctor, however, I was about the same gestation with my due date being the 21st. So do I go by the due date (even though I know those don’t realllly matter) or do I go by the week I’m on???