Not sure!

Alright ladies quick question, I ovulated on the 15th, well 4dpo I have light pink blood when I wiped, thought I was starting an early period but now it's been 6dpo and there has been no more blood other than what I mentioned (it was just that one time when I wiped) my question is how long do I need to wait after what I think could possibly have been implantation? I tested yesterday morning and today and both test was neg, but that's still to early? Right??