Hi Kajol, welcome to HealthcareMagic Forum.
Since your History suggests you have PCOS
it is known to cause Irregular periods
Imbalance. Since you are on 5th day of your Placebo Pills, you can wait for another two days for your periods to start. If they don't you should be getting a Urine Pregnancy
Test done using a early morning Urine sample. You should be seeing your Doctor even if it comes out positive or negative to rule out Pregnancy. Avoid stress
and eat healthy nutritious balanced diet which should include fresh fruits and green leafy vegetables. Exercise regularly and maintain a healthy weight. Stick to your treatment plan and go for regular follow up.
Hope I have answered your query, I will be available to answer your follow up queries.
Wish you Good Health, Take Care.