I'm not sure what cold sores really look like, so I googled it, but they seem to have the extreme versions, which I don't have. Basically, I pulled a girl last night and woke up this morning with a small, red bump under my lip (not touching it). If I touch it, it's very slightly painful. Could this be a cold sore, or is it just one of those pimples that come up sometimes? If the girl had a cold sore, how long would it take for it to affect me? Also, I have one on my neck, which hurts a bit more. I know it's difficult to assess over the net, but does it sound like a cold sore, or are they usually quite big? Thx