My 9 week old baby girl can get herself to sleep during the day unaided but at night she utterly refuses. I have lef her to cry for 2 weeks now and she cries everynight for up to 2 hours. Cannot take it any longer, I have used a dummy for the last few nights and that has worked but as soon as it falls out she howls again. Trying to break sleep associations with breast feeding. Any advice?