Can anyone help? I've been using the cbfm for 2 cycles now and this is the first month using the advanced opk. When I tested with the same urine sample today I got a low result on the monitor and a flashing smiley (high) on the opk. Which should I trust? I did accidently dip the stick out and back in the sample for the opk and didnt insert the test stick into the holder until after i had dipped in thw sample, could this have caused an error ? I'm not sure if anything I just wrote made any sense to anyone ! 