Massive Project Loss, unsure why

Hey, so I just lost around 5-6 hours of work, and I don't know why.
For some reason the borders between my video timelines were gone, and that prevented me from putting any Effects on a specific clip. I tried a handful of methods and none of them worked, but I noticed every time I minimized to search for a solution, the borders popped up until I went to a differrent workspace.
So, I hit Save and closed and reopened and practically everything I did was gone. I have only the bare bones of what I started with left. I was mildly worried, but I figured, "Hey, no big deal, auto-save."
I have my auto save to save every 15 minutes.
The last time it auto-saved was 5 hours ago.
I'm at a loss for words as to how to process what just happened, and if there's any way to fix this by getting a recent auto save or literally anything else, some assistance would be more than welcomed.