DS is 2.6.
Always been a naturally appalling sleeper (but luckily really easy going in the day!). Have done CC with him as a young toddler then rapid return as a bigger toddler, once he was in a bed. That had ironed out the worst of it, though early mornings were unavoidable.
These last 2 months he's been staying awake and whingeing for up to an hour once he's in bed (I've been going in every 10 minutes, tucking him back in & only saying 'goodnight' etc then walking out after 2 minutes max). He'll the wake at 11, then up to five more times after that, every hourish/hour and a half for no obvious reason. I can't seem to figure out why or get him to stop and am desperately tired 
Can someone please tell me what I'm doing wrong or what worked for you? Is it a phase I need to just wait out? Dreading the nights at the moment and can't do anything as well as usual as I've not slept a whole night in weeks. Pretty sure it's affecting him too...
THANK YOU!