I went to gycn for regular checkup to conceive. My blood repots are normal but was diagnosed with pcod in U/S.doctor gave me correctia medicine twice a day for 30 days and asked me to come on 3rd day of periods . But one week before periods I had spotting and it's been 10 days of missed period and pregnancy test came out to be negative.. Note : I am normal weight. I have regular periods . Please help.. What could be the reason for this.. And what should I do now?