implantation or AF

So this morning when I woke up I found that I had some pink spotting, just when I went to the toilet. This has become heavier as the day has gone on and is more like period bleeding. Problem is, I'm 8 days before AF is due and this is not at all normal for me, I've never ever been this early for a period. Obviously this morning I was excited thinking it could be implantation bleeding, however now I'm thinking it could be my actual period. Has anybody else experinced heavy implantation? Or been extremely early for a period?