Go to your internist and tell him or her about the problem. I just want you to make 100% sure that you don’t have an infection, which I don’t think you do.I say this because the rash is intermittent (it comes and goes), which makes me suspect that you are reacting to an irritant, which means that you probably have a contact allergy. Each time you come in contact with the offending substance, you react.An allergist or dermatologist should be able to help you detect what you are allergic to. It may be her saliva and vaginal secretions or a soap or perfume that she uses.You can run an experiment and perform oral sex and intercourse only with a condom. If you don’t react, then you have narrowed down the problem. If, however, you are already using condoms for oral sex and intercourse, then you may be reacting to the rubber or the spermicide.Good luck.