thank you for consulting HCM.the brownish discharge if it is 1-2 days prior to menstruation
then it is kind of normal.But if it is more than 2 days thenit may be a syptom ofadisorder and you need to be keep in mind of some diseases like
or diseases of hematalogical origin.
And brownish spotting in the middle of the cycle may be due to progesterone deficiency
or polycystic ovary syndrome
such typeof conditions need timely treatment.If there is any associated smell then you need to go for pcr tests and vaginal swab.