This is my first month using OPKs. This is the Premom app and it has me confused. The dark lines on CD 11, I didn’t take the photo till a couple hours later so I don’t think it is a true positive cuz glow says I’m supposed to ovulate on Sept 3rd. I had a chemical on Aug 20th. I’m just so confused on these lines cuz they get a little dark and then light and dark again?! Should I just keep testing until the 3rd?! Also when should you read a result by? 5 min? 10 min?!