ovulation question

Hey ladies, so I've never had this happen before and im a little confused. According to glow this would be my 3rd fertile day. I had cm on day one &a the day before that and a small amount day 2 but since yesterday and into today it's like there's nothing at all. Is it possible I already ovulated and didn't know it? Or is this normal? I can't remember this happening before so I'm a bit confused