It means that you definitely have hsv1. Statistically, it's an oral infection unless you have ever had genital symptoms.
Since you think you had cold sores a few months ago, it seems logical that this is an oral infection.
We don't know how long ago you were infected. Many people are infected as kids by well meaning adults who kiss us, and most people never get any symptoms.
About half the adult population has oral hsv1.
Here's some good info on oral herpes - http://www.ashasexualhealth.org/stdsstis/herpes/oral-herpes/
I'm not sure what you meant by "worried", but if you have specific questions, let me know.