Keep getting signed out

Hello Mojang! =D So my problem is that Minecraft keeps signing me out! It's happened 3 times now. And whenever it does I lose EVERYTHING! I don't know why I don't know how but it keeps doing it. Now I have a Minecraft gaming channel on YouTube and twitch and a new caves and cliffs world and I can't afford for it to get lost.

From Noob Lord4230

BYEEEEEEEEEEEEEEEEE =D