Help! My School Project Disappeared from Google Drive

I worked on a research paper for a month with my friends, Jacob and Matthew. Unfortunately, both Jacob and I got sick during the final week, and Matthew, who didn't get sick, went to school regularly. When I tried to submit the project on Friday, I realized it was missing from my Google Drive. I looked everywhere, including the bin, but it's just not there. I checked with Jacob, and he can't find it either. Matthew isn't answering my texts, and I'm worried since my grade is already at 57%. I created the document, so I'm confused about how it could have vanished like this. The only ones who had access were me, Jacob, Matthew, and our teacher, who has a reputation for being hard on us. Any advice on what to do?