Everything missing in hierarchy!?

Yesterday after a long day of coding, I SAVED MY SCENE ASWELL AS MY PROJECT and closed unity. and today I opened unity and found that my entire hierarchy was missing! I thought everything would come back by actually opening the scene but it was ALREADY OPEN! Only the hierarchy is missing, the scripts and everything in the assets is still there. Please help me! I spent a lot of time on animations and this is very disappointing! Help Me!

are you sure you saved your scene? maybe check autosaves but im not sure if it will work

@Bananik_007 how do I check auto saves? I always save my work, after every little addition. Also, even if I didn’t save it, how come literally everything is gone! INCLUDING THE MAIN CAMERA!!!