Hi Ladies Have any of you used the Early Pregnancy tests OPK's? I bought some for the first time and I used it 3 days ago and it had no second line at all. I did drink a lot of water though prior. So the next day I tried again but still had a spare one left from another brand that I used previously. This one was negative, but still had a visible second line. Yesterday I tried again using one from Early Pregnancy tests.com and again it had no line. Are they perhaps not that sensitive? Worried that I will miss my ovulation as I'm not getting any lines on them. Not even faint. Think tonight I will use both tests with different brands using the same urine and see what it does.