Opk question & kit
Today starts my first day using OPKS & I'm on Cd 7. My periods are irregular (ranging from 28-39 days) so I decided to start using them early vs. late. My question comes with documenting the result. The icons show 1 line or 2 lines. I understand OPKS are only positive if the test line is darker or equal to control line, so is that the only time I choose the 2 line icon? Just want to make sure I'm using the app correctly. Thanks in advance for feedback.