Welcome to HealthcareMagic forum.
It seems your mother has developed epistaxis
secondary to antiplatelet drugs; though it is necessary to rule out other causes too.
Getting her blood checked - platelet count
and coagulating profile can be helpful. Deranged reports will confirm drug induced bleeding.
induced bleeding can be managed transiently by stopping medication. But this is not a permanent cure. You would need to sit with her gynecologist and ENT surgeon and formulate the next plan of action. And as your gynecologist suggested hysterectomy
(removal of uterus) is a good option.
Hysterectomy is a safe procedure. It has minimal complications and she will be "Ok" after the procedure too.
Hope this helps.