Implantation bleeding or early period?

Niomi

Hi, I am 9 DPO, yesterday I had some very, very light watery bleeding and today it’s slightly heavier and bit more redder. My period is not due for another week, and I have never experienced an early period before. I was just wondering could this be implantation bleeding? I did do a pregnancy test last night and it came back negative but wasn’t sure if it might be too early. Any help/advise anyone could give would be great.