Talk to Gynecologist on Period Issue

last month mry period 5 days late huy tu Dr sy chk krwya and Altra sound krwya tu Dr said k right overy swelling hai medsn di h and after period again altrsound krwya tu Dr ny Kaha water cyst b bn rhi hai lakin abi bni nahi Jo Dr ny medsn di wo main use kr rhi lakin mj right side overy m abi b drd hai or aksr rhta hai last period date is 16 oct and period flow bht km tha plz guide