Irregular period occur. Bulky overy s/o?

I m unmarried girl bt i have irregular period since 2 month aur when i as to dr she tell me to do blood test and sonography.blood test is seen normal except abnormalities in erythovytes,lucosytes.and in my sonography it tell followig 1) bulky overy s/o? PCOD. 2) no e/o GB calculous wall thickning pericholic fluid or nodes or any billary dilation notes. 3)no e/o facial hepatic / splenic lesion, obvious peritonial lesion. 4) no adnexal mass or retro peritonial lymphadenopathy seen. 5)no e/o loculated fluid collection,abnornal mass or psedu mass, iliac vain thrombosis, hydronephrosis ascites significiant bowel dialation noted. 6)excessive clonic gas seen. So anyone help me out from this i do research and i found that it is cancer so i m worried plz help me out from this.....thanks in advanced.