Missing emails in Mac Mail client

My mail in the Mac Mail client suddenly only shows a few messages in my mailboxes. It is a gmail account, and I can access it on the web, where all of my messages appear. I rebuilt, I quit the program and started back up, and finally I shut my computer down and started it back up. Still missing many emails. I rebuilt it again when it started back up, still missing the emails. It is my work computer, (Macbook Pro running Catalina) and I don't have admin rights to it, if that makes any difference.