Afraid I'm not ovulating

I am on cycle day 13, I've been opk testing since day 7 with Clearblue Easy Digital tests. For the last 4 days I have gotten a flashing smiley face, which, according to the test, means high fertility. But when you get a solid smiley face, it has determined you have or are ovulating. Usually I get a blinking smiley face for 2 days, then I get the solid smiley face after that & know I have ovulated. Since my results this week, I'm afraid I haven't or won't ovulate this month. :( Sometimes my age really concerns me. (37)