Hey hun, I'm sorry your little one broke his thumb . I'm definitely thinking he's behaving the way he is because of the accident. My suggestion would be to give his as much as TLC as possible ATM, but try and settle him in his own bed if you can. Even if it is staying in his room till he falls asleep or cuddles on the couch. Once he gets taken into your bed the habit is hard to break (been there done that! lol). With the nightmares, again try and settle him in his cot, but obviously if he is really distressed let him sleep in your bed for the time being. I think also building his confidence while playing is also important as he might be thinking that he will hurt himself again based on what happened to him. GL hun, sorry I couldn't be of more help!