Can genital herpes only cause one sore ?

Hi. I am married & have not had sex with anyone but him for 4 years.

I scratched the inside of my lip on accident and it didn’t look like I cut it or hurt it at all.

The next morning I wake up to one white sore in that spot.

It has been a day and it itches and burns sooo bad. Now I got scared because I looked it up and genital herpes came up - can it only cause one sore ?

EDIT It’s inside my vagina lip by clitoris area I’m sorry I meant to write that!