Help! Brown period??

My period came 3 days early. Started with light pink spotting, then turned brown the same day. Barely was able to fill a panty liner the past three days. Stopped today. It was really really dark blood. Very light flow only when i wiped was it actual blood. Even any tampons i put in were brown. Never turned fully red at all.. could this be left over from implantation? I swear i had implantation bleeding the 19th. Wiped and it was bright pink then nothing else until this brown discharge.