My 7 wk old daughter was introduced to the bottle 2 wks. ago for night feedings only. About 3 days ago I had the flu,expressed milk, and left my husband feed her thru the bottle. Now she latches but gets frustrated after a minute or two of nursing. Her latch was perfect and she was an avid nurser. I've been working with the LLL, but she isn't in for 3 more days. What do I do in the meantime?