Hi, how long was he refusing to sleep for? Was it naps and nights? 20 months is quite young to go into a bed. I am just wondering if it was more of a blip than really needing a change. I see quite a lot on here of LOs around this age resisting or skipping sleep but then going back to their normal routine. Especially if he is more emotional and having more tantrums, I think it's likely a developmental thing. Do you think it's worth trying to go back to the cot and see how it goes? If you have to keep him in the bed then consistency is key. Reassure him if he needs you when he wakes, but return him to bed, stay with him if you have to as he gets used to it, but make it clear that's where he sleeps.