BBT 2 day drop confusion help!

Katie
Can anyone give me any insight into what is going on with my chart?
opk (clear blue dual hormone) showed Peak at CD22
CD26 FF put on the crosshairs for Ovulation at CD23 (3 highish temps plus opk result I guess)
Then yesterday (CD27) my temp dips below cover line and FF takes away the crosshairs. 
I was hoping it would go back up today, but instead my temp dipped further, and FF put the crosshairs back with O again at CD23.... I'm so confused as I'm new to this!
Yesterday had creamy CM that was slightly pink tinged so I recorded this as sporting, not sure if that was right or not. 
Any help/comments gratefully appreciated :)

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