I simply can't believe this. I got BFN at 11pdo at very sensitive test so I didn't test at 12pdo. I was just waiting for my AF to arrive. Today at 13pdo I felt pg so I tested and I got a faint line!!! I will test tomorrow to see if it gets any darker. Now I feel guilty of drinking 3x diet coke a day plus eating yogurts with sweeteners. Do you think I did any damage? x