Cd 16 and still not even a hint of LH, anyone else experience this?

CatHB

Anyone experience this before? I have a solid 28 day cycle. On cycle 2 ttc, had a baby 9 months ago and stopped bf 2 months ago. Maybe I’m still adjusting? This is my first time tracking with opks properly. Going a bit mad! Is there still a chance of ovulating even? Any advice greatly appreciated!