Could I be ovulating??

Krystal

First time user of Clearblue Advanced Digital Ovualtion test this cycle. I started testing on CD9 and got “O” (no surge) until CD11 when I got the flashing smiley face. I thought I’d have these for a few days but this morning CD12 I got a stagnant smiley face (peak surge). Is this possible to have only one “high fertility” day and go straight to “peak fertility”? That also seems to mean I’ll ovulate on CD13…is that possible as well?