When I first brought my DS home from hospital he would have two 4 hour sleeps during the night which was just nice. Now at 4 weeks he seems to sleep a lot during the evening and is up every 1-2 hours during the night and it's killing me. 
I'm not sure why the change has happened, he has just had a big growth spurt but this is still happening!
Is there anything I can do?
I really struggle to nap before night time 