Okay ladies I need some advice... I thought I started my period today  because this is around the time period is due...had brown spotting in underwear so I put a tampon in. By noon I changed the tampon it had brown and dark red blood on it. I waited until 5 o clock to change tampon again and it had nothing on it except some yellow/whitish cm and some brown.. after that I have had absolutely nothing just clear watery discharge...so could that have been implantation that I experienced? I usually have other Pms symptoms like cramps and vagina hurts really bad like clock work and this never happened so really abnormal for me..: