Unusual bleeding for month. Disorder. ?

I started  menstruation for 1 month now. It hasn't stopped. When consulted to family doctor he prescribed Tranlok-E for three days but my periods didn't stop. On February i did fingering and may have I injured internal side of vagina as I experience pain inside vagina after fingering. My periods started on March 24. Periods were about to stop but I went for swimming. swimming may have  increased this problem. My flow increased on next day instead of stopping. It hasn't stopped since then. Stopped bleeding for 3 days but had a bit spotting.  I am not sexually active. It was just for the first time I had fingering. What is the cause of this..? My other details are Age-25 I have pcos for two years. I am not sexually active nor had sex till now.  I had skin infection before that cured my smooth slippery kind mucus.  No red urine.  No pain in abdomen or stomach.  Never had this problem before. Can this happen because of fingering or it is just hormonal disorder.?