"The most important thing to know going into it is that it's hard at first. You just feel like you don't know if you're doing anything right. I remember I would sit there and I'd go, 'OK, millions of mothers today are feeling exactly what I'm feeling right now, so I'm not alone, it happens to everyone. It happens to the best of moms. You're going to get through it.' And one day, they look at you and smile and it's just the greatest feeling in the world and you know you're doing a great job."