I've been telling people the wrong due date

So I am due January 7th and I've been saying I'm due January 6th for the longest time. I feel really weird about it lol. I forgot my own due date. What the heck. I hope people don't think I'm a bad mom already. How can someone get their own due date wrong and for this long too. Ugh I'm so frustrated. Because now if I'll tell people, they're going to look at me weird or think I'm lying or something.