Why did Lightroom change all of my edits? And why doesn't Dehaze work now?

Just wondering if anyone experiecing what I am with the Lightroom CC and if there is a way to fix it. I'm new to Lightroom, but not photography. I usually just use good ol Photoshop, but recently went on a trip where I took thousands of photos and wanted an easy way to batch edit and organize - Lightroom CC.

The issue: Last week I edited over 100 photos and when I picked it back up this week all my edits were messed up, everything was super dark and not how I had edited things. Dehaze also makes my photo go black now if its not set to zero. In order to edit these photos I started with a preset and made some of my own edits to the preset and applied and tweeked to the other 100+ photos. At the time I also had to force quit Lightroom when I was done because it legitamittly wouldn't close out the program otherwise.

Is there any way to fix this? Or do I really have to edit the 100+ photos again that took me hours.