Hi everyone! Sorry, but I have a problem with my account and I don't know what happened.

A few months ago one of my Minecraft worlds, that I played so much, had a bug that does not regenerate the hearts. And then, today wen I opened the game I noticed there's just 2 of various maps that I maded; one of them are an copy of my common map where the lives can't regenerate, but that copy it's on creative mod. All the maps was saved in the app. 

I decided to not play it untill you can ask me what to do or what happened whit my worlds.

And my question is ¿Is possible to recover my maps and how can recover them? And if the non ¿regenerared lives problem how can it be fixed?