I am on day 27 of my cycle. On day 20 I had a big dip in my temp so I did an OPK and got a positive, but FF still hasn't detected ovulation and my temp is up and down still, not a constant rise. What would you think? believe the opk or wait for FF? (BTW I do ovulate late. Last month FF detected O day 26 of cycle but natropath said by lookng at my chart is was day 24.) This is so confusing.. I posted about my chart last month too! 29da49 Ovulation Charts