How could I ovulate before +OPK???

[Runner6160]

Hi all!

Fertility Friend has given me dotted crosshairs on CD17, which is a day or two earlier than normal O date. I am confused because this was a whole day and a half before my first positive OPK. It was a day before my peak on my ovulation monitor as well.....

Anyone have any experience with this? I am unsure if I actually ovulated, or if I should just continue to keep BD'ing.

Thanks!!!

https://www.fertilityfriend.com/home/3c0bee/thumb.png
My Ovulation Chart

 

[traylee01]

you didnt use a opk the day before that positive it could have been the night before also for a positive as you can have a few surges.
also your temps have open circles so they could be off to

 

[StranjeGirl]

Same thing happened to me. I had a positive opk at night (had tested all day and gotten negatives) and fertility friend said I ovulated that day. Ff has been off for me once before (I know because that month it only showed that I had a 13 day luteal phase and I always have 14-15 day lp. Do you temp orally? I do and I think it can screw up sometimes. My temp is a full degree lower if I take in some breaths with an open mouth. It's hard to trust every reading with oral temps, so I'd probably go with your other signs if those match up!