Many people with oral HSV1 never have cold sores. For those that experience symptoms it is usually like having a scratch say on your lip that has a small scab and takes a few days to heal.
I'm not sure. I've never really had a cold sore
If it is herpes, it is quite probably you have had this since your youth. More than half the population has oral HSV1 from their youth, hence this isn't something to be scared of, is it?