My dd is 15 wo and mix fed. Last night she wouldn't go on the boob, she just cried and cried. So upsetting, had to give her bottles and pump. Not a good development. What can I do? Tried her again this morning when she was more calm but she only sucked for about three minutes then the same, crying and thrashing. She normally has two bfs at least in the day and two at night with three bottles, first thing, midday and at bedtime. 
