My 9 week old has started a funny routine,shes suddenly(only a few nights so maybe nothing)sleeping more at night,i know i know its great but i mean she will go 8-9 hours at night then go back to sleep another 4 or so straight,problem is shes awake nearly all day,i love it because i can spend more time with her but i worry this is no good for her development,she just wont sleep much during the day if she does occasionally it will be a 2hour sleep but usually its half and hour here or there and then in the afternoon shes cranky because shes so tired!Is it ok for them to have there sleep all in one stretch and then not much during the day??I mean last night she went to bed around 8.30 then didnt wake till 6 and then went back to sleep from 6.30 and is still asleep now!