I got my period october 6th which lasted until the 11th.. october 20th. i went to the bathroom an noticed a light brown discharge, i knew it could be my period because i had my period two weeks ago, i heard about old blood from your last period, i have had my period for 4 years and never experienced any old blood from my previous periods at all.. the discharge lasted for a day in a half then went away, what could it be.. im suppose to get my period around the 6-7 of this month (november) so all i can do is wait.. is anyone familar with this happening to them?