Day and Night time routines - help?

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I know Ashley is only 1 week old but i am wondering if i should be doing something to encourage a day and night sleep routine?
SHe is an absolute angel during the day - rarley crys at all but between 8-11pm she screams the house down every night and sometime will take up to 2 hours to settle. Then she will generally sleep well overnight.
I already keep very quiet at night, dim lights, feed, burp and change (if she looks like she has discomfort down there or if i hear activity in the nappy). When she does fall asleep she generally wakes every 3 hrs for a feed (which only last about 15 minutes at a time - is this long enough? - she has lots of wet and dirty nappies!).
It seems her bowels open over night and i am wondering if this is the reason for her restlessness and difficulty settling between these times at night?
Should i play with her more during the day - i talk and touch her more during feeds in day time.
At the moment we bathe her every 2nd day in the morning... should i do this at night instead?
Any hints would be appreciated,

p.s sleeping her in the cocoon at night inside her bassinette worked too for those who read my last post.

Thanks!
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