Hello, and I hope I can help you today. Any woman who is having unprotected intercourse is at risk for pregnancy. However, pregnancy symptoms vary widely between women, and many of the same symptoms we commonly associate with pregnancy such as nausea, bloating, breast tenderness, headaches and irregular bleeding can also happen from an irregular menstrual cycle as well as pregnancy. So there is no way to know if you are pregnant solely based on symptoms. The most common sign of pregnancy, however, is missing your period. So if you have not missed a period, it is unlikely that you are pregnant, but if you desire a definite answer, over-the-counter urine pregnancy tests are just as accurate as a doctors office and will be positive 2-3 weeks from conception. I hope I was able to adequately answer your question today and that my advice was helpful. Best wishes, Dr. Brown