BBT chart help..

Analicia • Baby L ❤ 1/8/15
My cycles have always been 27 days. For as long as I can remember.. I never got positive on OPKs after CD 15 so I stopped using them.. I am now 3 days late w BFN. FF pushed my cycle to 35 days & glow has me due for AF tomorrow.. guess I'm just confused as to what's going on? Any thoughts/help would be appreciated! Thanks!