hi, i'm haveing this dark brown discharge for about 10 day now. i had a so- call period that was just two spots back to back for two days. i am sexually active and i am not on any birth control. im no sure if im pregnant , i took a home pregnancy test and was negative. my husband and i have been trying for about 4 years and never got pregnant. my periods are always normal and verry heavy. this month just two spots followed with dark brown discharge.

any advise?