Hi I had questions about a condition I have had for about 2 weeks now & just wanted to know if anyone had similar experiences.

I rarely ever get acne but I have recently been getting outbreaks especially around my chin area. I had this one pimple below my lip on the left side but not on this lip itself. I had put salycylic acid on it to try and dry it up. Unfortunately it only made my skin turn into a dry patch with the pimple bump still under it. I have a habit of picking my face so i ended up trying to peel the dry skin off and it kind of made my skin really raw. I then took a needle and tried to pop the pimple and squeeze anything out of it even though it had no visible head. Nothing came out. Maybe a day later the sore kind of turned into what I thought was a cold sore. There were a few small blisters not too close together on the area that was really itchy. I've had cold sores a lot when I was a child so I thought thats what it was. The only difference is that it healed really fast when I was younger. It healed a little after a few days a turned into just a light pink blotch that looked like a scar. So i then put vitamin e oil on it to help with the healing. The next day I woke up and the site was itchy again and another bump(s) formed. It didnt really look like a bunch of cluttered blisters but rather three bigger blisters put together. I went to doctor and he said it could be impetigo and prescribed mupirocin. I'm currently on my first day of using it and it still itches and looks the same.
Also the one of the blisters looks like it has a white head sort of like a pimple
Questions:
1. Do cold sores usually recur in the same exact spot right after healing or is there usually a break in between outbreaks?
2. Does a cold sore have to be on your mouth or connected to it?
3. Could a cold sore last forever?
4. Could it be impetigo even though it doesn't look really yellow colored like impetigo usually does?
5. Could the white head probably mean that it is an infection such as impetigo?

Thanks