Negative OPKs

So this is my first month consistently trying OPKs. I have longer and slightly irregular cycles (31-40 days) since going off bc. The last three months have been more regular 31-32 days. Glow and another app had my window from CD 17-22. However I had ewcm on CD13/14 so I started using OPKs that day and have used them twice a day since. Also woke up in the middle of the night CD14 with what felt like a pinch. It seemed like the lines were getting darker that first week, but never as dark or darker than the control. The next week there was a second line but very faint. Currently on CD 26 and never got a true positive. Tests are slightly darker again. Experiencing breast tenderness increasing in severity since CD18 as well as horrible heartburn constantly. According to original predictions, I'm supposed to start AF a week from today.

So did I miss my ovulation window? Or any chance I still haven't O'd yet? Or am I not ovulating?