Is this really Implantation Bleeding?

I still had the spotting and I have checked online if implantation bleeding can last for more than a couple of days and i found out that some implantation bleeding can last up to a week.

Implantation bleeding is actually caused by the implantation of the fertilized egg in the lining of the uterus, which can cause a little shedding of the uterine lining for some women. Although not all women experience this, one out of three do experience the spotting.

I am hopeful that this is really it, but of course, the excitement is not yet at its full level. Although there is a feeling of having some light-at-the-end-of-a-tunnel thing, i still have to wait for the big fat positive (BFP).