It’s so difficult to sort out what might be going on with your lip. Do you want to send me a picture? Usually, a cold sore will emerge within a day or two. If it is a cold sore, the good news is that you aren’t going to give something back to the woman who gives something to you.
And I seriously doubt that what you have is a cold sore, at least from what you’ve told me so far. Normally a cold sore would have significant sensation – tingling, creeping, etc.
Do you think you could be overobserving symptoms?