Have questions about TTC and need some insight from those who have used the clear blue easy fertility Monitor.?

Hi there, i have been TTC for 9 months, i too am using the CBFM. As far as im aware once you get that peak on your monitor you are ovulating. If you were'nt the peak wouldnt show up. I would start off witht the lows, then a few days of high, then 2 days at peak and then the last day would be back to high. Last month using it i gave me all highs for about 17 days in a row and didnt show peak at all, it was so frustrating. I rang the helpline and was told i was over wetting the sticks!!!! Bummer as they're not cheap. We had every 2nd night up until about day 20 of my cycle and i used preseed but didnt use too much. Anyways i got my period yesterday so my monitor must have been right, i didnt ovulate. I went to my doctor on CD23 as she told me to (i lied to her and told her i was TTC for 12 months to be taken seriously and get tests done) so she took bloods and i get the results next Monday to see if my progesterone levels are low or whats going on. Its very frustrating especially when my sister has only been married one tiny month and is now pregnant. My other sister is overweight and has two children and she also has had an ovary removed and here i am not able to have one baby!!!! Life is cruel sometimes