How do you know if you permently lost your period from anorexia?

I haven’t had my period in a year and a half,after anorexia, I weight around 110-115, 65in, female. I recenly stopped exercise, to see if that’s the problem. How bad would my anorexia have had to be to permently have lost it

you’ll probably have to see a doctor.
it might depend on the individual. a friend whos anorexia was so bad she was admitted to hospital got her periods back once whe was a healthy weight after 2 years of not having one. she now has 2 children.