My 9 week old hasn't been feeding properly for a week now. At one point she was having 4/5oz bottles even a few 6oz every now and then. Now she rarely has anymore than 3. She's just gone a 7 hour stretch from her last feed at 12:30am to 6:30am. She's only drank 2oz. Surely she's still hungry. I don't know what to do I don't know how she is putting any weight on. She gets weighed on Wednesday but I am now just getting more and more worried.