I would second the opinions already given - Get your GP to arrange for a second opinion.
Endometrial ablation has been shown to reduce the incidence of mennorhagia hence its popularity, but the results on those patients with vWF have been equivocal.
von Willebrands can be thought of as being in the same family of disorders as haemophilia, and for that reason surgeons are understandably worried about procedures that may offer the potential for severe, uncontrolled bleeding in patients with an underlying disorder of their coagulation system - but vWF is well recognised, and there are methods for controlling it - such as the use of drugs which stimulate the release of factor 8 ( DDAVP), the use of synthetic blood factors both before ,during and immediately post surgery,
You should not have to live with such an impaired quality of life - definitely go back and try to arrange with your GP for a consultation with a Consultant Haematologist and a secondary opinion from other O/G surgeons.
3 references for you that may be of help/interest;
http://medical-dictio...on+Willebrand+disease
http://www.nhlbi.nih....D/vWD_Treatments.html
http://onlinelibrary....1900+SGT+to+210