Period is late but BFN

Becky
So very frustrated hoping somebody can give me some advice.
​I had my coil removed in January and my periods were funny at first but then settled into cycles between 26 and 30 days over the last few months. Today I'm on CD 39, so am assuming I'm at least a week late... But all tests are BFNs... Anyone experienced something similar? 
​Ttc baby number 1, doc said I might have pcos too which I'm worried is the cause of this long cycle!
​Thanks xxx