Itch, odor and discharge....

I am not really sure what’s going on but I have an odor coming from my vag that like stains my underwear with it’s smell and I also have this brown discharge which I believe is partially dirt from working out and sometimes I notice an itch like if I workout and can’t shower right way. It’s not on the inside part but on the outside part. I also never shave down there and I work out a lot and I was just wondering if those are contributing factors. Any advice helps!!! Thank you