Due my period tomorrow or Monday (haven't fully nailed the tracking) but had a dark bleed just now. Could just be the start of my period but I remember getting an "early period" last time and it turned out it was an implantation bleed... Suddenly everything I know about periods has left my head... Are they normally dark when they first start?! Am I just getting ahead of myself and too excited... Don't want to do early response test just to be disappointed