Deleted Page – not by me?

I had my web site up and running for the past year. I’ve not deleted anything, yet when I got onto my web site this morning it states that there is no blog on the front page. How do I find out who did this? I have a cyberstalker and am afraid I’m being hacked, which means this will turn legal. I have to speak to someone regarding this issue at WordPress. Need help immediately!!! Thank you.