Hello.
Were you getting regular periods or it was always irregular, late?
Whenever there is a delay in getting periods, especially, after having intercourse in that period, 1st we should rule out pregnancy. Then think of other causes.
If your periods are irregular in general, it is better you consult personally & take proper treatment for the same.
Next Steps
Get a
pregnancy test done & be sure of the cause for the delay in periods
Health Tips
Don't get overly anxious. Once you find the cause for your problem, it can be dealt with accordingly. Good day