I don't have regular sex, but when I do- like a few days ago, I get a red, itchy vagina. It was unprotected sex, but am confident it is not STI related. In the past I have been checked when this problem has surfaced and it hasn't been anything. This is a reoccurring problem, as I've noticed it only happens after intercourse. Is it simply irritation from chafing or something more serious? Is this a common occurrence?
There is often large bouts of no sex between partners so I'm not sure if it will go away with more regular sex/after adjusting to new partners.