Line progression

Kasey
I though I had a positive opk yesterday, but this is today's. New to opks. Does the line stay dark through the surge? Or is this my positive and I'm going to ovulate? Had what I believe was some ewcm yesterday afternoon. I bd'ed the past two nights but should I again tonight? Or wait a day? Any help appreciated. They are almost exactly the same. 
Top pic yesterday bottom today