I got a very close to positive line on the morning of day 14 of my cycle but I forgot about the test and only looked at it a couple of hrs later. I tested again in the afternoon and the line was back to being faint and has been ever since (now on day 17). So I'm wondering if it was a positive that faded or if it is more likely it got darker. I had a period last month but I'm still breastfeeding so I don't know if my cycles are regular yet.