I went into my Minecraft survival world and it said that my world got corrupted and I got back in like a whole bunch of chunks disappeared. It breaks my heart having to see all my work gone :(

same, my villagers disappeared. I revisited my first world and I found that everything was gone.

Thank you for your report!
We're actually already tracking this issue at MCPE-58514, so I will resolve and link this ticket as a duplicate.

If you would like to add a vote and any extra information to the main ticket it would be appreciated.

If you haven't already, you might like to make use of the search feature to see if the issue has already been mentioned.

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If you have a copy of the world available, you might like to upload a copy of it for investigation.

• On Windows 10 you can use the Export world feature.

• On Android or iOS you need to use a file explorer to navigate to Device storage > games > com.mojang > minecraftWorlds

• On Xbox or Switch the only way is to upload it to a Realm, and then download the world on Windows 10 or Android/iOS. (Please do not purchase a Realms subscription just to provide a world to us - but if you have a Realm already this may be a viable option if you wish to do so.)

If the world is larger than 10MB you can upload the world to OneDrive or a similar file sharing site, and then share the link.

I have a copy of the world but how do I send it to you guys?

Please upload the world to OneDrive or a similar file sharing site, and then share the link.