Do you get oral cold sores? Have you ever tested for HSV1?
I have never had an std and i dont think she had either, she definitely didnt have an open sore at the time.
i dont want to be overly optimistic but part of me feels like its contact dermatitis psoraisis eczema or a fungal/ jock itch situation based on researching other links and images.
i am getting tested in two weeks but am not sure if its more immediately needed....
my understanding is not showering or cleaning after unprotected sex can also cause a drying out and i have not been very vigorous in my personal hygine..
I would pursue a diagnosis for this, it really could be any of the above!