I thought I was ovulating twice!! But BBT shows nada πŸ˜ͺπŸ˜”πŸ€·β€β™€οΈ Can someone help me out?! (With chart and ferning pictures)

I’m on my second cycle after coming off BC. I had partial ferning cycle day 11, there was some on CD12 but this was much lighter and not defined. Then CD13 nothing - β€˜fine’ I thought, β€˜I’ll ovulate in a few days’. Then CD17 the strongest fern patterns were present but today (CD18) NOTHING. BBT has remained low so I don’t know what my body is doing 😩🀯

Someone please help!

Ferning from cycle day 11.

Freeing from cycle day 17: