Missing Emails

Last night I was on my email and I know I had multiple emails saved in inbox in order to use the information on them for work. Coming into the office this morning, and not only have the emails I saved last night, disappeared completely, but multiple emails from trash that were previously deleted popped back up into inbox on their own and the entire last week of deleted emails are gone completely. The earliest date in my trash is 7/4 now, and its 7/12. No emails were permanently deleted by me, and now they're just gone. Everything that I lost is now gone and completely vanished, and I need the information on those emails. Is there a way to recover these? And I'm not asking to recover deleted emails, I know how to do that, and these emails aren't just deleted they've vanished completely.