Suggest Treatment For Irregular Periods

sir.. im 25 yrs F. I DONT GET MY PERIODS REGULARLY... I USUALLY HAV 2 MONTHS GAP .. married 2 yrs back ... i don hav kids.... 1 yr back i hav consulted gyne... she told me that i hav PCOD.. I HAV PRISCRIBED WITH FEW CONTRACEPTIVES AND THEN ALSO MY PROBLEM WAS NOT SOLVED AND ALSO I HAD MANY PROBLEMS WHILE TAKING THE MEDICINES... QAND ALSO I HAV GAINED WEIGHT...... RECENTLY I HAV VISITED ANOTHER DOC AND HAD SCAN... I HAD 4CM CYST... AND MY DOC SUGGESTED ME TO HAV LAPEROSCOPY.... SIR CAN U PLS GIVE ME SOME SOLUTION FOR MY PROBLEM... IS IT NECESSARY TO GET OPERATED?? THANKQ SIR.. WAITING FOR UR REPLY...