Chris, I am in Newcastle too. Do you know about the online Ashermans Syndrome group? Look under Yahoo Health Groups. It is a fantastic group for information & support. In Australia we have one of the top 5 surgeons in the world for AS corrective surgery. PLEASE look into that.

Some women do experience continued milk production after a miscarriage. Usually it's a question of pituitary function. The tests your GP has ordered should help pin that down.
HTH.