Well you got tested and you don't have herpes or anything else, other than contact dermatitis from the soap. Why don't you wanna believe it?
If it's still red, go back to the doctor and get some cream for it. I doubt it's any kind of major infection sitting there for 7 months. Are you washing it, looking at it, prodding it a lot? You could be irritating it. By the way, no oral sex when your partner has a cold sore! You really can get genital herpes that way. But you didn't get it, ok? I hope you stop worrying