DS2 was always great at sleeping from day one at night he'd wake for a feed then bk to sleep. Then all of a sudden around 5 months this stopped. He started waking at least 6 times in the night around 4am then every 20-40 mins after. He has 3 7oz bottles the last one being at 11pm and 3 meals a day and snack so i'm pretty sure its not hunger. He does have a dummy but even if i put it in he wakes again shortly after. I've tried controlled crying with not much luck. I'm so tired and he's waking poor DD now.
Any advice much appreciated.