Forget this guessing stuff. There were sticks out there that could tell you the day or 2 around when you ovulate and dammit - I was going to use them!
I started using them on cycle day 9. The trick of these is that there's a test line that's always dark pink and a line next to it - you're ovulating if that line is darker than the test line. I had no idea how hard that would be!
So, cycle day 10, 11, 12... you get the picture. Then on cycle day 17 (not exactly day 14 like I thought), it looked darker. We had sex the next 6 days straight. Seriously. TK didn't complain!