Implantation bleeding

How many dpo were you when you had implantation bleeding? I am 12-13 dpo. AF is supposed to be here Wednesday. I have 31 day cycles and usually start on the 9th of every month unless there are 30 or less days in the month which throws it off by a few days. But I always have 31 day cycles so I'm supposed to start on the 10th this month. I took tests yesterday and today and they were negative, they were the 88 cent tests from Walmart. The first signal brand. I always feel like buying those are better because eventually I'll get a bfp and it'll be worth spending a fortune on tests to prove to my eyes what I'm really seeing. Anyway, I have been having breast tenderness and for a few days now and noticed dark blue veins in my chest and over one of my nipples TMI I'm sorry. It just happens to be the nipple that I breast fed my daughter from when she easy first born. And that seems to be the most tender breast for some reason. Today I felt some nausea around dinner time and I couldn't finish eating because I felt like I was forcing myself to eat when I was feeling sick to begin with. I ended up lying down to get it to go away and have been very exhausted all day and fighting to keep from falling asleep. I used the restroom earlier and noticed a very very tiny bit of light red blood when I wiped and it was only there for two wipes and stopped I'm not cramping or anything and it's anything little early for me to be spotting. So I'm just curious if anyone else had implantation this late? I've had it before with my last pregnancy which ended in miscarriage in September and it honestly can't remember when I had it but it seemed to be only a few days before my missed period.