Headed Back To Work

So in a few more days I'm headed back to work. My daughter is nearly 3 months & my son is nearly 23 months. I will be working part time Tues, Wed & Thurs.'s until September. It's going to be tough being away from my babies. My daughter just started to eat baby food she is doing really well. I will continue to breastfeed for as long as I can. My lunches will be spent pumping at work to try and keep things going. She still does not like taking a bottle. I tried giving her breastmilk & water in a bottle & she refuses to drink. She would rather go to sleep then drink out of the bottle. I hope she get's used to it fast I'm concerned that she will loose weight. I need to loose the baby fat not her.