Missed the surge or not ovulating ?

sa

Hi

I had 7 days of the blinking smiley. I have been testing only once a day in the morning. Now today I got an empty circle. .. could have I missed the surge ? How many hours does the solid smiley usually stays... or did I not likely ovulate. ..should I just stop testing for this month. ..? Thank you !

Note that we had a chance to bd yesterday after I got the blinking smiley. ...