My 4m baby suddenly became really unsettled at night- he had been going down easily and at times slept 10-5 (otherwise he would wake up once)- then he suddenly stopped going down easily and woke up much more- even as much as hrly through the night. I have tried everything - the hv suggested solids and DS has been having firstly one small meal at lunch then solids at breakfast and lunch -from approximately 2 1/2 weeks ago - he is now 5 months and he is still not sleeping much (last night he went to sleep and 11 woke up at 2.30 and was awake until 5.30-6 - only sleeping intermittently on me. he now appears to be constipated as well. I don't know what to do. I think he has day and night muddled up and is eating less than he needs during the day but i don't know how to increase it. I express when I can but he feeds so often i don't seem to have much spare milk- is formula the answer