If the files were on the hard drive, they can be retrieved. Call your IT folks and have them work on retrieving them for you. Your company should have back ups down every night to ensure that the data is kept safe, etc. Tension is high because of lost files...but they will be found.
I'm sorry you are having a rough day and hopefully things will calm down once the files are located. I hope that once the dust is settled you aren't fired.
One more time...breathe!
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.
