I'll be going back to work when DD is 6 months, she is currently 6 wks. She needs to be weaned from the breast at that stage. Its complicated but without getting into it, I won't be able to express during the day. I had a daft notion that come the time, I'd just give her a bottle of formula and all would be fine but obviously thats not the case. What is the best way to prepare for this and when should I start?