Please specify me since how many months you have irregular periods
As you are thinking few talk and over exercising do not cause any delay in periods
If you are having irregular periods for months together than you have to start worrying about your health which usually leads to PCO's in this present trend which causes irregular periods.
Next Steps
if you have this problem continuously for more than 3 months than you have take one USG abdomen and pelvis so that you will get a clear idea
Health Tips
as of now u eat papaya daily and eat sesame seeds which will favour you to get your periods faster