She's 11 weeks old and you're wondering if it's too late!!!!!!! Goodness, my youngest son slept right through the night from 6 weeks old, but I don't think it was anything that I did that determined that, it was just that he was ready for it. My eldest son however - what a different story! At 11 weeks old he was going to bed at 11pm, getting up for a bottle in the night then going back to sleep (if I was lucky!). He also had long sleeps during the day. Carry on with what you're doing, making sure that the routine for night time sleep is different than for a daytime sleep and she will eventually get into that routine, but remember that she is an individual and will not be in the same routine (if any!) as other 11 week olds - don't start comparing her to eg friends children. Love her, enjoy her and don't get bogged down too much in details!