Has it been more than 72 hours of unprotected sex?
A urine pregnancy test kit can confirm pregnancy in a week's time of missed periods. Wait for your periods to arrive. If they do not come then visit a gynecologist for further treatment and evaluation.
You can also visit my clinic International fertility centre located in Delhi that offers varied gynecological treatments and services to help you have a successful treatment. You can mail me your contact details to reach you.