If you are that high in the list the best thing you can do on a seperate computer or logged completely out of google accounts, just do a search for the term and fidn your site.
One problem and someone else can advise is if I do the same search in a different part of the country, the results MAY be different. I'm not sure on that.
I use http://www.seoserp.com/web_tools/google_top_1000_serps_checker.asp but the results are starting to look aa bit dodgy where I did rely on it before.
Chaneg your search settings temporarily and set it to show 100 results at a time and do a page search for your site.