Clear Blue Digital OPK

I'm 4 days away from my period. Just for the hell of it I've been doing my ovulation tests for the last few days. And every day it is telling me that I am almost at my peak (blinking smiley face). Ovulation was over a week ago. Why would I be getting this result 4 days before my period? Is it detecting a possible HCG surge?

On a side note I also am experiencing heavy Creamy CM, which is not common during my actual ovulation time.