I'm glad you are working on reducing your stress levels. The Mayo Clinic says that mental stress can temporarily alter the functioning of your hypothalamus — an area of your brain that controls the hormones that regulate your menstrual cycle.
You mention that you tried hormones as one of the treatments for your amenorrhea. Have you had your hormone levels tested recently? When you tried hormones, what were you using? Did it have any affect at all?
Have you ever had your thyroid levels tested?
Do you exercise? And if so, how often or how much? Was over-exercising a part of your eating disorder?
Are you on any medications?