I've gotten a pimple in the same spot before so I didn't think much about it. I popped it and put some toothpaste on it but then it just came back the next day. I've had it all week and it still hasn't gone away. I now have another small one, that really just looks like a small red dot on the exact other side and one on my lower lip (both just small red dot)....can this be herpes? How can I know the difference between herpes and a pimple??