Help with strange search problem

Could this be some type of hack/virus/malware? If not, any thoughts would be wonderful. If I should post this in a different forum, be kind, I'll fix it!

Hello everyone... I'm hoping someone can save my sanity.

I built a website many years ago for a client. It's run just fine! In the last week or so, we've encountered a serious problem.

IF you type her address into the browser address bar, the site comes up just fine.

IF you try to search for her, you get several different pages from the site listed. Those links do not work, they give me this error:

Not Found

The requested URL /batters-forsakes.php was not found on this server.

Additionally, a 500 Internal Server Error error was encountered while trying to use an ErrorDocument to handle the request.

Apache Server at www.juliewear.com Port 80

There IS no /batters-forsakes.php anywhere on the site. I can find no reference to this on the web. Any ideas?
 
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