My ds is 17 wks and seems to sleep quite a bit during the day. Often he is tired after only an hour and a half and has to go down for a nap or becomes incredibly grumpy. Is this not a little unusual for his age? This can be the same all day until his bedtime at 7pm.
Generally he goes down easily at bedtime after a few rocks in his moses basket and is then left awake to settle himself. Currently he tends to wake at around 10.30 - 11pm for a feed and then sleeps till around 4.30am. At which point he will either feed and go back off or stay awake 
I'd love to try and establish some kind of routine whereby he has the same wake up time each day and same nap times but he's so erratic I dont know where to start.
Any thoughts, advice or general comments appreciated xx