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 table should be listed
mysql> show tables;
Step 4. Repair table
mysql> repair table {bad_table_name};