lost the link to my home page

I assume you mean a link in your site that always comes back to the home page correct?

If thats the case, try something like this:

<a href="<?php bloginfo ( 'siteurl' ); ?>">Home</a>

That points to the main URL of your site as set in wordpress or:

<a href="<?php bloginfo ( 'home' ); ?>">Home</a>

That points to the page you have set as home in options.