I was planning on leaving my 7 week old dd with her dad for couple of hours this weekend so I can get my hair cut. Will be the first time i've left her. Would like to leave them with a feed of expressed milk as she tends to feed every hour and a half. We've been trying last couple of days with a bottle and expressed milk and she will not take it. She screams really badly and gets really upset. Both me and my partner have tried and tried different times of day and with warm milk etc. At the most she'll take the teat in her mouth but then starts crying really badly. What can I do. . .