I don't have specific advice because I haven't returned to work.

But I wanted to say regarding "we have developed some bad habits that work for us. Namely breast feeding to sleep." If it works for you, it's not a bad habit My DS fed to sleep for a long time and slowly outgrew it. It wasn't a bad habit, just a need of his I was happy to meet Don't let other people make you feel bad about anything you do with breastfeeding, especially if they're not breastfeeding!

I would say the other poster's advice is good. Just feed when you can and don't worry too much about it. My DD gets rocked to sleep in the pram by nana, and DS was cuddled to sleep holding a musical toy. They find other ways to settle when they have to