My animation got completely messed up after trying to render animation to adobe media encoder

 I made this 20 second ish animation with a ton of layers and symbols. And when I tried exporting, Adobe Media encoder crashed and I got a ton of errors on Adobe Animate. Now my timeline is completely messed up and I don't know how to bring back my original animation. This is extremely frustating, please anybody help me. How do I bring back my previous verisons or even just fix this?? 

I tried to attach my file but it says I don't match the file extension. I don't know what to do.

I use the Adobe Animate 2022 verison also.

Please help.