My world is suddenly corrupted and gone

Dear Mojang. Right now I'm having trouble.When I was playing minecraft games then suddenly I sign out of my minecraft game. I'm having trouble when I try to log in again. And when I can get back into minecrat, I've lost my world.I lost the whole house I was building up 😢.While I never delete my world. Please help me, mojang.What do I do? I want get back my world... Please help me to fix this.Thank you in advance ....I love you Mojang ❤