I don't think a computer tech will be able to help you. Once you delete it, it's gone. You can, however, click on the history and scroll through websites you've visited, you might be able to find it that way.
Hold down the CTRL button and click H. That should bring up a bar on the left side of your screen. You can click "View" and sort by date, most visted, site, etc.
Hope that helps.