My DD has always done two poos a day or at least one but she now hasn't pooed for 2 whole days. She is nearly 11 weeks and otherwise seems just fine - alert, feeding well and lots of wet nappies. I know in my heart of hearts that there probably isn't anything to worry about and that nappy watching is a dangerous sport but just wondered if it was normal for things to suddenly change like this and at what point I should start to worry?