Lost last save(s)

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I'm new to Fusion 360, but not new to tech and cloud services.
I started a new project, made many revisions, and save obsessively. I made some intricate revisions near the end of my workday a week or so ago, clearly recall making those revisions as I had to take lots of measurements, walking from site to computer several times. After I finished I saved at least twice just to be sure. I likely saved several times more as I added each piece, but at the end I am 100% certain that I saved.
I open the project a week or so later, and those last, most intricate changes to the project are not in the model. The history and all details I can find in Fusion and the cloud views are not there. I want to say that Fusion also performed autosaves, but I'm not familiar enough yet to know for sure. So, I'm wondering, how can I restore lost saves? Did it perhaps autosave to my system and that is where the changes are instead of in the cloud? Where can I find and restore lost revisions?