My 7 wk old baby has been taking 140mls at 11pm then sleeping until 4am. Recently he won't take more than 60 mls at 11pm so has been getting up at 2am when he will only take another60 mls and then sleeps until 4am. Have no ideas why he won't take milk we have tried everything to get him to take more but keeps refusing. I want my sleep back! Has anyone got any ideas?