Hugs! You haven't gone wrong...you are doing great :) How many times a night does she nurse? Do you co-sleep? Have you tried explaining to her that the "milkies (or whatever word you use) are asleep right now"? My DD nightweaned at about 18 months and she was nursing every 30-60 minutes (no, I'm not kidding). With no prompting from me, she just suddenly started sleeping 4 hour stretches and was down to one nursing session in the night so I took advantage of the change and started telling her after her last nursing session that the milkies were going to sleep and wouldn't wake up until morning. She only fussed a bit the first night and has been fine ever since. Luckily it was a non-event. I know every child is different though. We co-sleep btw.