How many days past ovulation am I?

I got a positive ovulation test on the morning of June 16th (around 9:30AM). It was a clearblue easy digital test that has the smiley face show up if it indicates your LH surge which it apparently did ! Now my question is ... Based off when I got that positive when did I ovulate? And if we BD on the 11th, 13th, 15th,16th (at night), and 17th (at night) are my chances of conceiving high? also because my period is very irregular and I can never know I am late or not, when should I take a test if the test says it will show a pretty accurate result at just 10 dpo?