My ds2 who is 5 months has suddenly started sleeping horribly, I mean waking every 1.5 hours, won't be put down in his cot, and usually is awake from 1:30am to 4:30. I'm trying to cope with him and his brother (just turned 2) on 3-4 hours of broken sleep a night. So... Thought I would try pupd. He's ebf and has always fed to sleep which was working brilliantly until last week. Would love to hear any stories from people who've tried it and any golden nuggets of advice! He is a great character and v strong willed so I'm not expecting it to be easy... TIA