chart help! any idea what's happening?

Mallory
Longest cycle and BFN again today ... no idea what's happening but I would appreciate any insights you might have!  Went off BC 4 months ago. Last cycles were 28 and 34 days.   Started bbt charting Jan 1 as a New Years resolution. 
Cramping past 2 weeks but especially CD 26/27. Naseous CD34-36.  Drinking lots of water. very tired. Slight lower back pain. 

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