My ds seemed to be starting to sleep through the night fairly frequently until a week or so ago (from around 11pm to 6 or 7am) but recently has started waking up two, sometimes three times a night again. Most of the time he wants to be fed. He is 16 weeks old and I wonder if he is ready to start solids? He is breastfed but I give him a bottle of formula before bed sometimes in the hope that he will sleep better but this doesn't seem to make any difference. Any ideas? I am REALLY tired as I have a dd too who seems to want to join me on those nights when ds does sleep through!