Confused!!!!

I am using the Clearblue advanced opk... 2 days ago and yesterday I got "high fertility".. spotted yesterday and checked today and bled again.. Seems like AF has showed up but it's not completely flowing.. How could I have gotten "high fertility" 2 days before AF.. does that mean I really didn't ovulate??? I feel like I lost out in my fertile days this month.. 😥. Has this happened to anyone here?