Thought my window was over is there still a chance for this cycle?

Mama Constantine

So my opks went peak on day 15 it’s now day 18. I had 4 days of peak fertility on Clearblue connected starting the 28th/ day 13. Here’s my current calendar. The egg has most likely dissolved by now right? I’ve already been through my fertile cm stage and it’s dried up. Anyone think it’s worth a shot?