I know that your problem can be serious, but see guide below

In case it isn't be effective, then look at this thing mysql repair tool, that was found in Google couple days ago

Step 1. Log into mysql as administrator
mysql -uroot –p
Step 2. Select the database containing the corrupted table, i.e., ‘use {database name};’
mysql> use {database name};
Step 3. Show tables your corrupted...