About crina ncr 15mg. Taking crina ncr?

I have pcos. I usually have periods for 4 5 months and then it stops. Then I used to take meprate 10mg to start bleeding. Sometimes I had to take oral combined contraceptive pills to regulate my cycles. (All prescribed by a gynaecologist). My cycle length varies a lot. Sometimes it's 33 days and sometimes 46 days. For the past 1 and half year I had menstruation  every month but the cycle lengths varied every month. Sometimes 30 days, 35 days or 46 days too. I had my LMP On 29th march 2024. After that I did not have periods in April and May. I have been sexually active with my partner since 4th of May 2024. Before that I was not. I did home pregnancy test thrice in May and it turned out to be negative thrice. My doctor has prescribed crina ncr 15mg twice daily for 5 days over phone. I had started taking the medicine from yesterday. I just wanted to know how crina ncr will help me in my menstrual cycle and can I have sexual intercourse while I am taking crina ncr?