Every woman's body is different. Some woman skip periods even. So yrs this could be normal, probably nothing to be concerned about. Just don't stress it unless you have a reason to be concerned.
If you have started your first period within the past 4-5 years then it is perfectly NORMAL I am in my 2nd year of having my periods and at the moment my cycle is 41 days long ( I have my period every 41 days )