implantation bleeding or period??

today is a week before my period is due, about an hour ago i started bleeding lightly it was pinkish also with a little spot of red in it, so i took this as implantation bleeding because i have been doing my research on it, anyways i put a pad on and like 15 min ago i had to use the bathroom and there were like 4 little spots of blood on it...once i used the bathroom dark red blood came out and was heavy when i wiped....does that mean im not pregnant??? =[ it seemed kinda stringy to me....what does this mean....i went back to check and nothing more on my pad and when i wiped it was a little bit of very light pink again