Confused about ovulation????

I'm currently on cd 19 and my clear blue fertility monitor for the last week has given me a rise but not a peak???? But last week on cd15 I got a positive on a cheapie????? Have I or have I not ovulated? We are dtd every 4 days to cover us. I don't normally ov til around cd 20-24 but the cheapie stick says I have. Is it possible the cb monitor would miss ov? I do the monitor first thing in the morning and the sticks throughout the day. Sorry lots of questions! TIA Xhttp://images.tapatalk-cdn.com/15/07...7518be3ad7.jpg

This was my cheapie opk on cd15 http://images.tapatalk-cdn.com/15/07...fb4c213a3a.jpg

I hate the digital ones, I really do! I used the same cheapie ones you're using. That strip looks positive to me!

Yes, CBFM can miss surge but also the sticks can be false pos. I can't tell you if you've Oed or not from here, my advice is when in doubt, attempt!! Don't wait for the tests to agree because they may not. Try at whichever gives you a pos and then if the other gives you a pos few days later (anything beyond 4 days later) have another attempt.