You are having uterus didelphys
means double uterus.You had haematocolpos in which hymen is intact and menstrual blood gets collected inside.It is not a big operation.A small incision is given in hymen and blood is drained out.Why can't you have children ?
Chances of abortion
and premature delivery are more but you can have term pregnancy
also.What you are saying is ' mirena
' coil I suppose but without your knowledge how it can go inside your uterus ? In your case you will be needing two coils.