There are several kinds of skin conditions that could cause an open sore and itching. Also, if it's near your anus, you may be aggravating things each time you have a bowel movement and wipe yourself. I have a friend who needed a temporary colostomy because the feces kept aggravating an open sore and it was constantly infected (probably much more severe than what you're experiencing). I've suffered from eczema for years and while I never had it near my anus, everything else fits exactly. This is a long shot, but you might want to talk to a dermatologist. The fact that you have herpes may just be a coincidence.
Hi -
A herpes sore would not remain open and unhealed like this for this long. A herpes sore usually heals within 2-10 days.
If your husband has hsv1, he could have given you genital herpes by preforming oral sex on you. He could have hsv1 and never had a cold sore. If this is the case, you'd have genital herpes type 1.
However, that doesn't mean that this is herpes. It sounds like you need to have your doctor take another look.
Do you have the results from the test they did? It sounds like they did a culture, but did they do a type specific culture?
So in all, I can't say if you have herpes without knowing more about your test, and even if you do, it really doesn't sound like your symptoms are being caused by herpes, or at least not herpes alone.
You can read more about herpes here - https://westoverheights.com/herpes/the-updated-herpes-handbook/