Implantation Bleeding Questions?

Christina
I am currently 7 DPO and I have he he following symptoms over the past couple of days: 
Headaches
 Sometimes White watery CM sometimes clear watery CM
Dull cramping 
Pinching cramping
Frequent urination
Moody
And today I was checking my cervix and when I took my finger out there was a very small amount of light pink blood. 
Could this be implantation bleeding? Anyone else have any experience with IB around 7 DPO??