Hi,welcome to hcm,if the periods have been quite regular for a number of years and then suddenly stop or the cycle becomes frequently interrupte,it denotes adebilitated and devitalised condition of the system.causes towards the condition are anaemia,worry,grief,fright or other serious emotional disturbance etc.you should have three meals aday of fresh juicy fruits like apples,pears,grapes,papaya,orange etc.you should boil one spoon carrot seeds in one glass of water for 5 to 6 minuts and take itfor 5 days in early morning,it is very beneficial for this.sesame seeds are also use like this.warm hip bath is also regulates the menstrual disorders.take care