I'm glad you're going to see a doctor. But now let me ask you a weird question. Is it possible that you left a tampon inside from your last period? I don't know how far along you are into meno, but I know I left a tampon in once and it was awful. Once I figured out what it was, I just pulled it out (gross) and I was fine. Sorry if I grossed you out.

Other than that, I have no idea what could be causing the odor without a discharge.