Implantation bleeding is not actually proven. Please read here.
http://www.askmehelpdesk.com/womens-...tml#post250352
Now, is your period anywhere due? It may just be the beginning of your period. Every once in a while mother nature throws us ladies a curve ball and we either start early, start late, or skip a period all together.
Typically, what women believe is implantation bleeding is when they are pregnant and their period is just beginning to gear up when the hCG hormones rise and slow or stop the period once the spotting has begun. It does not mean that you are bleeding because something microscopic has implanted.
I will keep my fingers crossed for you.