Your pimple was most likely just that....a pimple.
HSV has blistering lesions that are painful to touch and quite noticeable. You would not have a little pimple here or there. Believe me! You may just have an ingrown hair or a simple pimple or hair follicle that is infected from oil from your skin. Do not be overtly concerned.
Hey King, although not qualified to answer your question, I do believe that those aren't signs of herpes. If you take a look at all the pictures (ie. Google, yahoo images etc), they resemble nothing of that sort.
To be on the safe side man, just go get tested. I'm kind of in the same boat at the moment and I had a clean STD test result. I wish people on here would answer questions when posted, I have yet to receive a response to mine.
Good luck nonetheless buddy.
Someone plz give me some feedback?