Implantation bleeding??

Maria

How long does implantation bleeding usually last? My AF is due on the 14th of September but yesterday I wiped and saw very light pink blood so I thought it was my period but instead I've just been having brown discharge like dried blood and is not enough for a pad just a pantie liner and everytime I wipe I have this dired blood, could it just be an early period? I've had the brown spotting all day yesterday and today don't know what to make of it.