Google, she is a helpful thing. And she provided me with this site, which gave me this info:
Q: What time of day should I test?
A: The best time to test is 2 p.m., or as close as possible. Anytime between noon and 8 p.m. is fine, first morning urine is not recommended. The reason for this is that most women experience a surge in the morning, but it can take 4 hours for it to show up in your urine.
Make sure to test at about the same time every day.
And further perusal of said site led to reading this:
Q: I used an OPK, my timing was perfect, why didn't I get pregnant?
A: It often takes a number of perfectly timed cycles before pregnancy is achieved. The chances of getting pregnant each cycle varies a bit with age. If you are 20-25, your chance per cycle are about 25%. From there they begin to fall off. At 25-30 your chances are about 20%. At 30-35 they are about 15%. After 35 they may be about 10% per ovulatory cycle, and the chances continue the downward trend.
This means that the average woman under 30 will get pregnant within 6 cycles. If you don't succeed after a year, it is a good idea to consult a fertility specialist. Women in their early 30s get pregnant on average by the end of 9 cycles. Mid-30s would be a year. If you are over 35, you should consult a fertility specialist if you have not achieved pregnancy within 6 months. Why 6 months when it can take a year? Because your chances of conception are lower and miscarriage rates are higher -- it is better not to waste time.
Okay, bad, bad idea for me to read that. Only a 25% chance of getting pg each cycle? I knew it wasn't a supremely high chance, but twenty-five???
Yeah, my over active anxiety levels just can't handle that kind of information.