Hi! I'm 31 and ttc #1 for almost a year. I just bought the Clearblue Advanced (previously had been using just the regular OPK). I started testing at CD 12 and got negative/low results. Yesterday (CD 15) I tested in the morning and got a low again. Then, I went to work and got home around 5:30 pm and tested again and got peak. I read the instructions and it said to use only first morning urine and test once a day. Oops! Now I'm thinking, could it have been a false positive?  Has this happened to anyone? Has anyone not gotten any highs and just peak and they still got a BFP later?  If so, when did you BD?