I'm scratcing my head over this one a bit so some thoughts would be appreciated

By my CM and temp I thought I O'd on or around cd 14 but now FF thinks it was on cd 19.
Usually when I O my temps are low, around 35.9ish. And also I only had one day of strechy CM but around CD 14 it was EW and watery :-k

http://www2.fertilityfriend.com/home/8aff6

Thanks.