Now I think I'm pregnant, but I don't remember when my last period was. I have no signs except that I've been feeling sick to my stomach for the past week. She has assisted at over 1,000 births and is currently teaching in the nurse-midwifery program at the University of Minnesota. I'm sorry that you have found yourself in such a predicament. As you know, withdrawal as a method of birth control is not very reliable nor does it protect you against sexually transmitted diseases.
Nausea is only one symptom of pregnancy.
You might think about that if there is a next time. It is very important that you go to a doctor, health department or Planned Parenthood clinic as soon as possible for a test and an exam. If you are pregnant, they can counsel you about your options, and if you are not pregnant, you can get on some reliable method of birth control. Above all, don't panic. Find someone who you can confide in and take one step at a time.