Pingbacks and Trackbacks

Hello
I have an odd problem with pingbacks (and I think trackbacks as well). Any links within my own site (eg when I reference a previous blog post) are sending pingbacks. However I am not receiving pingbacks from any other blogs or websites, even other wordpress sites. Has anyone else has this problem and know how to fix it? I’m not quite sure how to troubleshoot and test it, as I only have the 1 website myself.