Hello braniacs,

I had unprotected sex with my fiancee on the 6th of January being a thursday. Ten days later however, she did get her peeiod, according to her she is always three to four days dayed on every period, but there has been no track whatsoever. My question is, despite ten days ago of having unprotected sex what are the chances that she could be pregnant? Keeping in mind that her period started on the 16th of December. This moth her period also started on the 16th of January. Exactly a month and not a cycle of 28 days. Please help with the most logical and scientifc advice. She really is freaked out!