I was wondering if anyone has had their doc give them a way wrong due date? When I calculate when I concieved from my current due date it says I got pregnant around Thanksgiving, but I remember being sick as a dog with morning sickness like feelings at least 3 weeks before that. When I first went to the doc they calculated it from my last period and got the due date as August 3rd which makes more sense, but then changed it when I went for my ultrasound to August 19th. I know that its only a few weeks difference but I am trying to figure out when to go out on maternity leave (I want to go out at least a few weeks before) and I don`t know what date to go by! Anyone else had this happen?