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You have taken progestin hormonal
tablets for postponement of your period.
If you had unprotected sex and took I pill to avoid conception.
Usually these contraceptive
pills are effective in preventing pregnancy
but they are not 100% .
Now your period is delayed we need to rule out pregnancy first take urine pregnancy test if negative you can wait for few days if your period comes it may be due to hormone imbalance
If pregnancy is positive (Less likely) you will be required to consult Gynecologist for further management. You can also get blood test
Beta HCG which more sensitive than urine test.
Hope this information helps you.
Dr.Akhilesh Dubey M.D.