So I got what I think is a positive OPK. This would be CD 12 if I count CD 1 as the first day of my m/c. I took one yesterday and it was definitely negative. Took a digital with the same urine as the one in this pic and it was negative. Looked up their sensitivities and the digitals aren't as sensitive. That kind of irks me since they are more expensive. Anyway, here is the pic. What do you think? I am going to test this afternoon as well. I also got an error on one of the digitals which makes me even more mad because it's a total waste!