Hello, and I hope I can help you today. Pregnancy symptoms vary widely between women, and many of the same symptoms we commonly associate with pregnancy such as nausea, bloating, breast tenderness, headaches, increased basal body temperature, and irregular bleeding can also happen from an irregular menstrual cycle as well as pregnancy. The reason you have these symptoms is that the hormone progesterone, which is produced both during PMS and pregnancy, builds up if you miss your period and causes side effects that can be mistaken for pregnancy symptoms. In addition, it is common to have irregular cycles immediately after discontinuing hormonal contraception. The most common sign of pregnancy, however, is missing your period completely. So it is unlikely you are pregnant if you did have a menstrual period, even if your symptoms were not typical. However, a urine pregnancy test will be positive within 2 weeks of conception, so if you are in doubt, I suggest you purchase and perform a urine over-the-counter pregnancy test. I hope I was able to adequately answer yor questions today and that my advice was helpful. Best wishes, Dr. Brown