I am going back to work soon. She has been breastfeed for 11 weeks now. last week she took the bottle a couple of time and now she wont take it at all. I struggle all day with her taking the bottle. Even my husband tried during lunch time and she refused it. I have using drop in playtex. I brought three type of nipples size.. she refuse it. How long did it take for your child to take the bottle.