Chronic bad smelling vagina

I have been STD tested (negative results) and I shower once a day or sometimes twice if I go to the gym. No matter what I do, my vagina smells bad after a couple hours post-shower. I don’t even think it’s from the discharge but the actual odor secreted by the oils near the labia or something. Does anyone have any tips on what I can do to stop this embarrassing problem? Gyno was NO help.