Help with Opk please!

[nichib83]

Hi all. So I got a positive (the same as the control line) one day which I took as my positive. Then the next day I got a mega dark line which was way darker than the control line. My question is...which one would you class as your actual positive opk?

I also have a two day surge. I then seem to ovulate a day or two after the second day of the surge. Just keep shagging over the next few days, it doesn't make much material difference which day you count as your positive, it's just one long surge.