Sorry if this is a daft question! New Mum! I'm reading the Wonder Weeks books, and also the "What to Expect" app, and there's a lot of week by week info about newborns, but I'm confused about which week we are currently "in". What week will the next 7 days be? For example, if my baby was born exactly 5 weeks ago today, does that mean we are now about to go into week 5 or week 6? Or to put it another way, have we just completed week 5?