tmi underboob sweat and vaginal discharge

so I get underboob sweat and i naturally release heavier/more discharge (when not aroused) I get stains on my bras and can turn them a brown color on lower portion I change bras on a daily basis and clean them regularly. because of my discharge being heavier normally I get stains on my underwear and again I change underwear daily and clean them regularly but have a stain on my underwear. I'm wondering if people had any suggestions for preventing this from happening. I want to avoid wearing liners on my underwear if possible.