Clearblue opk and ovulation

Jamie

I took one yesterday and it showed LH surge, took one later it said no surge, took one this morning, no surge. We had sex yesterday when I got the smiley face, should we have sex today too ? Since my <a href="https://play.google.com/store/apps/details?id=com.glow.android">glow app</a> says today is one day post ovulation. Just wondering