Could this be implantation bleeding?

Munz
Hi 
So I'm only due to get my period in the next two weeks.
I've been having a lot of cramps and jabbing pains on the side of my tummy. It's either the right one day, or the left on another. They keep alternating, together with some mad headaches, however this evening I noticed a slight tinge of pinkish blood on the tissue..Could this be implantation bleeding and how long does it last for?