I think most peoples due date gets moved slightly. I was put back by 3 days (but 4 dates...confusing) Yours is quite far back but I read a post where one lady was put back 3 weeks so I think its pretty normal. Sometimes you get moved again at your 20 week scan, so you might get moved forward again then. Congratulations on your pregnancy =] xxx
Mine still keep changing lol ... Thye took weeks off what i thought on my first scan , Then they gave me a few days back lol Then took them away again . xx .