Don't you worry about nothin'.
I used to get big pimples on my labia long before I was diagnosed with Herpes. Seriously - it happens... I even used to just pop them - it felt much better afterwards. But if you do that it could get infected...
Not to get too personal, but when did you have sex prior to your findings of this little pimple? Just curious - I'm sure it's different for everybody, but my outbreak happened the very next day. I mean - vomiting, couldn't walk, pain...the whole nine yards. Just curious is all...