I Am Suffering From PCOS And Whenever My Periods Are

I am suffering from PCOS and whenever my periods are delayed for 2 months or more my doctor prescribes my cyclenorm p and e tablets and then they happen. For now they have been delayed two months and I had sex 1 week before, it was coitus interruptus but this time my boyfriend is not sure, can I take cyclenorm p and e will it work as a contraceptive?