Hi there, I have understood your concern. I will suggest you the best possible treatment options.
1 ) First of all do not panic.
2 ) As per your history, you might have taken the pills as
emergency contraceptive pill. This may not be adequate dose of hormone
progesterone to prevent the
pregnancy.
3 ) If you have crossed your expected date of the cycle and you have some of the pregnancy like symptoms then I will suggest you to get morning's first sample of urine tested for pregnancy. In case of doubt blood
beta HCG test and USG will be of help.
4 ) Even If you are pregnant, you can opt for termination of the pregnancy with medicines safely till 9 weeks of of pregnancy under medical supervision.
5 ) I will suggest you to get proper sex
counselling done. Use of suitable contraceptive method like condom, will help to prevent unwanted pregnancy and STDs.
I hope this answer helps you. Thanks.
Dr. Purushottam Neurgaonkar