Have you have a previous dnc? or uterine trama? It's sounds like what you are dealing with may be ashermans? Or maybe a divided uterus? There is a forum called asherman's.org where there are many ladies that are dealing with adhesions. Some are pregnant.
My scar tissue was removed after the csection birth of my baby girl!
Second pregnancy ended with a healthy son and NO sign of scar tissue.
Wonderful news :). I now have 16m g/b twins after having my scar tissue successfully removed :)