Content Missing, Will Not Restore Revisions

The content in I don’t know how many of my posts is gone and for over a week I have not been able to restore the revisions of the ones I know are blank. I have repaired my databases and tables.
A few months ago, I lost all my content (pages and posts), revisions, and categories. I migrated to a new host and resubmitted all my posts and pages. I don’t know if the same thing is happening, but I need to fix it. Please help.