Warning , picture included w/ drops of blood !

I was wondering if this could be a sign of implantation? It happened 4 DPO which is too early I think. My period is also due in another 6 days so at the time of the spotting, my period wasn't due for 13 more days. The spotting was assisted by slight cramping on the right. I don't know if any of this is normal.

Comments ? Explaination ?