Hello dear Understand your concern Chance of pregnancy is definitely as your second sexual intercourse is unproductive and you did not use ECP. So highly possibility of pregnancy as your period is delayed. I advice you to wait for few days. Once your period will delay by more than 14 days from your normal expected period then go for pregnancy confirmation by urine pregnancy kit/Blood HCG/ USG scan. Still if you do not want pregnancy, you can terminate by using misoprostol plus mifepristone under the advice of gynaecologist. (Intrauterine pregnancy should be confirmed first) Other possibility of delayed period is hormonal imbalance if pregnancy test/USG will give negative result. In this case period will be induced by giving medroxyprogesterone preparation after consulting the gynaecologist. Hope this may help you Best regards Dr. Sagar