I just started temping this cycle. FF had forecasted fertile days for mid December for me.  My past two cycles have been about 55 days each.  Saturday (CD 19) I had a ton of EWCM--which was so unexpected since FF said it would be about a month until I would possibly ovulate.  So I ran to the store to grab an OPK kit.  I tested, and it came back negative.  Today I have absolutely no CM.  My temp barely went up.  I have never used an OPK.  Is it possible to have O'd and have a negative OPK?  Thanks.  
                
                             
        
Re: Do you think I ovulated?
Yes, but because of your temps, I don't think you've O'd.
Carina 12.28.2010 | Aurelia 9.23.12 | Chart - Round 3