Disappearing Form

Hello,

I was working on a very large form document that I opened from the Mail app on my Mac OS. While I was working on it, I continuously saved the file on Adobe Acrobat Reader DC, and Reader confirmed that it was saved. I closed the file after I was done, but when I went back to open it, it was gone. Not in the recent files, not in my files, just gone. Now I am really panicking because I need the information. How can I get it back/can I access any autosaved files?

Thanks