Hello.Welcome.there are other blood tests to be done along with ultrasound
abdomen to finally diagnose your PCOS.There is no need of any biopsy for the diagnosis of PCOS.Your pain in back and gas in abdomen may be due to GALL STONES
you are having.You will have to undergo cholecystectomy
for that.Your leucorrhoea
( white discharge ) can be managed by medicines.Talk to your doctor for that.My advice to you is reduce your weight and do regular exercises.your most problems will go away.Good luck.