No you are not pregnant as you already had your periods after sex. Delayed menses is due to pcod. I can help you in pcod with homoeopathic medicine without side effects. You can consult me at Lybrate. To cure pcod permanently homoeopathic treatment will be helpful.
PCOD will never get reduced with tablets. Treatments aims to correct the issue they are facing. kindly stick on to lifestyle modification, diet , sleep pattern to get cured from PCOS problem. This will help u in long run
Femilon is progesterone hormone and break through bleeding, means spotting is side effects of hormones. Regarding how long this effect lasts. It's difficult to tell you days. Hormones are fat soluble and they don't get out of system by drinking water. Don't take more hormones. Tolerate bleeding off and on for few more days. Eat healthy and exercise according to your lifestyle and take no tensions.
You can take as long as 10 years. It does not have side effects. Moreover, it gives protection against cancers in the uterus. However, check with your gynecologist with examination once a year for cervix and breast.