Hello,
You are aweful young to be going through this. It is difficult to say if we could help. Obviously we would like to try. Without knowing all the details, it is difficult to know what else can be done. You may benefit from working up increased clotting tendencies to investigate why your grafts closed. If you decide to come, try to bring all your medical records including angiograms of your legs and operative reports.
I hope this helps. Thanks for posting.