Clear blue not working?

Valerie • TTC again. Mom to one 👼🏽

Got a peak yesterday morning on these test strips. While I was testing on the strips I tried my clear blue digital as well an it wasn’t working properly after 3 tries. In the evening I tried again an got a “O” for not fertile. Either I missed my window or my clear blue wasn’t working. What do you think? Did I already ovulate