My Minecraft World Will Not Appear After Closing Minecraft

Hello! So, I got a problem, I had been playing a Minecraft world with my brother for like 3 months or so, the world was called "Minecraft". Ok, so today I played alone and everything was pretty alright until, I wanted to play something else, and when I came back and tried to play again, the world wasn't there. I know you can check your world saves on file explorer on Java version, but I play Bedrock, and I think I found the world, but I don't know if that's even what I got to do. When I started (when the world dissapeared) the game told me I got to sign again on my Microsoft account, but only that world was gone, I need help to solve this problem. I hope it is not corrupt. Thank you. Don't think adding an image will help, so I won't send one