Hello, Pregnancy can rarely happen in the manner you have described. If you happened to be in your safe period at the time, you have natural protection. Pregnancy should be confirmed/excluded first before deciding on anything else. It is possible to get pregnancy through semen deposited on the vagina during the fertile or ovulatory period. Please wait for your next normal period and if you miss it, get a HPT with a fresh early morning sample of urine. If you wish for an earlier and better confirmation, you can go for the blood test for pregnancy a couple of days prior to the expected period. If positive, induction of a medical abortion under medical supervision is the only safe way out if you do not wish to retain the pregnancy. Take care.