I have an ovulation question. I got a positive OPK yesterday when I tested at 1:30PM. Then I got a negative test at 6:30PM that same day. Today, I got another positive test at 1:30pm. I held my urine for 2-3 hours on each test, so I don't think one was diluted. I know that surges can last a day or two, but I don't know why I would have a positive, then go to negative, then have another positive. Thanks for any anwers.View Thread