I started sleep training my son at 5 1/2 months. It seemed to take a few months before he was able to sleep all night. However, he was still breastfeeding at night. I used the pick up/put down with him to get him falling asleep on his own. Then, at about 7 months, I tried to get him to stop nursing through the night altogether. I used a dream feed around midnight and slowly (every 3 days or so) moved the feed closer (to 11:30, then 11:00, etc) until he finally didn't need to nurse at all in the night. Not sure if this would help you?? If you are nursing at 6:00?? He still would wake up a couple times a night for quite some time (even now does, too!). Sometimes he falls right back asleep on his own, but sometimes he needs me to go in his room for a quick comforting shush and/or kiss. I would try and tough it out with the Walk in/Walk out. It does take time and unfortuneately every day is different, but eventually it will be worth it.