I purchased the digital clear blue opk tests on the 30th. The non advanced one. On the 30th it showed a solid smile face. That night I tested again and it was a clear circle. We DTD on the 29th. I just wanted to test again to make sure it was still a clear circle and my O passed so I just used another one. The first of the this month and now it's showing a smile again 2 days later. I'm really confused. Does anybody know what this could mean?