Hi Doctor, I Have Pcod For Several Years. I Did

Hi doctor, I have pcod for several years. I did lap for pcos on 20th jun 15, I have my next period on 5th Aug. Now doctor suggested to try naturally and gave me apcod for one month twice a day. Then I missed periods for 12 days. I took hpt on my 6th and 11th day of missed period. Both are neg. Don't know what exactly happen. Is there any irregular periods arrive this month too. Is possibilities for pcod again after the lap within a month. Make sure whether I am pregnant? Or not?. Suggest when to take another hpt or consult my doctor..... Pls clarify my doubts. Thanks for your valuable time....