Our DS was a terrible sleeper until 6 months when we got help from Andrea Grace. He changed from waking up every 1.5 hours to sleeping through with a week of her training. He's now 9 months and we're going through the classic regression. He's almost crawling and teething and only slept 4 hours last night. In between was mostly hysterics, screaming, thrashing etc. We don't know what to do as he just won't settle. I buckled and fed him at 5am and he went back to sleep till 8.30am. But I've broken Andreas 'cardinal sin'. Help...what do we do? Would we undo it all if we fed him in the night now??