How long does everyone hold it before they take their OPK? I go at 2 and then not till 4:30 to take the test (as I am leaving work). I have a small bladder so even stopping drinking after lunch is still hard. I can't imagine holding it any longer. Not to mention I am thirsty! I wish that you could take them with FMU. Maybe I need to invest in the CB monitor just for this reason