Bad news: Your Db is dead!
Good news: It can be retrieved!
Unfortunately I can't tell you how to retrieve it, because i don't remember :o :o :o
Basically, if you have access to your webserver, you have to go to the mysql directory, within that there's another directory (maybe tables?) which stores a copy of the db for you.
If you don't have access to the server, just ask the ISP webmaster.
I know this ain't much.
HTH
Kamy