Go for complete gynecological examination. There are chances of organic growth in your uterus. There can some fibroids as well. Either case get biopsy.
Why Am I On My Period For So Long?
If You've Been On Your Period For Two Months Straight, I Suggest You Go See A Doctor.
I have that same problem and it's so annoying!
I last even longer then that I have been on for 2 months and ill go of for 4 months then bleed 2 or 3 months.