Hi..thanks For Providing A Great Oppurtunity To Ask My Health

Hi..thanks for providing a great oppurtunity to ask my health realeted queries.I am 21 years old unmarried female.I had been gone through laproscopic cystectomy yesterday.A Cyst of 10*10 cm was diagnosed outside my uterus right ovary and kidney. I am advised by the Dr. to take femilon tablet for84 days to stop my menstrual cycle and then to start it again on 91st day that will be the fifth day of menses. I had to continue this till my marriage. I want to know why am i being given this tablet and also will i have to face any complications during pregnancy in future?