Cause And Cure For Brown Vaginal Discharge

Hi, I'm Kasi. For the past 3 days I've had a brown discharge every time I go to the bathroom. I've done research and my situation doesn't match anything I've found. It's not thick, it doesn't have an odor, it's just there. I haven't had my period in 4-6 months if that helps or not. I'm just curios as to what's going on. Do you have any ideas?