Hi, since 7months, why is my period 2days earlier every months? any problem need to show to the doctor or its fine

A. Look if it is happening two days before then expected period date and it has been happening for sometime then your period cycle has changed that is why this is happening and due to sometimes change in hormonal cycle or disturbance and cycle this can happen but if the periods are happening the same way every time that means the hormones and the period cycle has changed permanently