This is a totally random question that popped into my head from watching a commercial, but I was wondering if any of you who do NFP have ever used a home fertility test - like a pregnancy test, but to tell you when you're ovulating - to "double check" yourself? I know if I was starting that method, I would be insecure about my own accuracy at first, and this seems like a great way to see if you're right! Kind of the opposite of what the fertility test is intended for, but seems like it would work. I'm just curious to see if anyone's done this!