Conversation: The conversation between human and AI assistant.
[|Human|] Hi. I had sex with my boyfriend on Saturday. He was not using a condom and he doesn t think he came inside of me but he is not for certain. I did not take a plan B and I am not on birth control. I was ovulating according to my period calendar about 3 days before I had sex. Could I be pregnant? I am very scared
[|AI|]  Hello. I have read your query. The calendar method for birth control is not 100% effective to prevent a pregnancy, as it relies on calculations to determine the fertile period. This is especially true when intercourse happens around the ovulation time. In case the periods are not regular the method is unreliable. Do not worry, just wait for your period to come normally. If it's late do a home pregnancy test or an ultrasound to confirm. I would recommend moving to other effective reliable forms of birth control. Talk to your gynecologist about it. Hope this is helpful. Take care.