Hello! Welcome to HealthcareMagic!
I understand your concern. Some reasons that cause brown discharge are:
1) It may happen right after periods and is just "cleaning out" your vagina. Old blood looks brown.
2) This may occur when you are ovulating/mid-cycle.
3) Sometimes early in pregnancy
you may have spotting or a brownish discharge at the time your period would normally come.
Hope my answer was helpful. If you have any other question Ill be glad to help.
Thank you for the query.
Dr. Dorina Gurabardhi, General & Family Physician