Gross!

Hi everybody. Need some advice here. When I work out (or sweat in general) my “nether regions” smell awful! My body sweat doesn’t have a strong odor, but it does down there to the point that I have to launder my pants after every time I wear them. Not sure what going on. Any thoughts? (Oh and yes, I did mention this to my OB but she’s a looser and just blew me off) 😡