First time bbt charting ..please help..did i ovulate?

Hellow gals...i have a 31-32 day cycle and i had my okp positive on cd 17-18...kindly comment on the chart...also i started charting last cycle 12-13 days before my period (charts attached) ...i temp chart same day each day....however..i am yet to get a cover line..when does glow put a cover line???