hi
welcome to health care magic
Have you take the tablets as advised (that is one tab with in 12 hrs & 2nd with in 24 hrs) Irregularity of periods is common with
contraceptive pills .But there are also chances of failure in all types of contraceptive methods so better option is to get a urine
pregnancy test done at home with the first morning sample to rule out pregnancy.If the test is negative then you can wait for 1 week & even then you don't get your periods then consult a doctor.
take care
thanks