Colds can do weird things to charts... they can give you high temps and/or low temps. I had the same thing with my chart when I had a toothache... FF didn't know what to do so it said I had ovulated and then changed its mind a few weeks later (I have VERY long cycles). I would say that FF may correct itself once it gets further info from the next few days.
Based on the cold info I would say that CD12 is not when you ovulated but the fertile CM around CD15-CD17 may be when you ovulated. The negative OPK is also going to confuse FF.
Sorry I haven't really been much help... I hope that with a few more temps FF sorts itself out.
I am only new at reading charts but I would say your about to O as there has not being a consistent temp above the coverline. Do you have any other months to compair it too?
Not really, but most of my last charts I have ovulated around CD 18, that along with the cervical mucus is what made me think ovulation was/is on its way!
I know that with getting up for the boys and having a cold my temps have been a bit weird... my temps seem to be higher this month than other months, I'm usually around 36/35.
based on your chart today, I think today is ov day, it was last month according to f/f and you can have quite a few days of fertile mucous before ovulation. Are you also charting you cervix position etc, it can be very helpful in just confirming what the cm is doing.
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