Any suggestions for my 4 month old stuborn baby?! I have been breastfeeding only no formula. She has…

Any suggestions for my 4 month old stuborn baby?! I have been breastfeeding only no formula. She has had the bottle at least once a week since birth . Started her at the sitter about 4 weeks ago and since then refuses to bottle feed. We start a new sitter today and ill be working longer hours so im dreading it. She wont even take the bottle from dad or me. I've tried diffrent nipples , bottles , milk temperatures. Shes just not having it. She uses the soothie pacifiers just fine too. Ugh help me help my sitter and give me a break. #myfirstpost