I have 2ds one is 5 and other 2 years 8 months. When DS2 was 9 months I became very ill and he was looked after for 3 months by loving au pair and dad, at same time he had major feeding and sleeping problems due to Adenoids blocking his nose. This took a while to sort out during which he found it very hard to breathe and sleep at night.
Since then he is very attached to his dad, and if in room he will only go to him. It is also causing him to wake nearly every hour to check dad is around. Have tried controlled crying, but just makes daytimes worse. Now hardly going out at night as can't leave him with anyone, plus very wearing on mum as only wants his dad. Anyone experienced this and has advice, on getting him to stop being so worried.