I am 17 and having sexual intercourse. I need your advice and help guys since this a women's health forum. I just need to know if this is a sign of pregnancy. For this year, Last January, I had my period at the 2nd week to the last of the month. I had sex again last Feb. and my period missed. Now it is March and for the first week, I had this discharge, yellowish and sort of sticky.. After it was a brown stain.. I thought it was my period but still I don't know yet.. It was brown, dark brown or black. then now that the month was about to end, I had this discharge again but this time, it was just light brown or dark. I should have this by the first or second week of the month right? I don't know what to do. I am really not prepared for pregnancy yet.. But everytime we have this sex, we do withdrawal.