herpes starts with a yellow/white thing
then it turns red,
then it gets red with some yellow things inside it

plus if u bursted it,
In case it is herpes it should continue in there and will keep getting bigger until it burst again and all the virus comes out
If it doesnt...then its not herpes...

I speak from personal experience...

usually when you get a pimple near your lip 9 x's out of 10 it is a cold sores, and cold sores tend to turn to blisters.
you can buy over the counter medication to get rid of it really fast. dont touch it because if will heal faster.
my skin is dark so it's impossible for it to turn red.
i m going to email you information that answer all your questions about herpes.