If two weeks after sex you are feeling sick after eating and you cannot smoke because it makes you sick could you be pregnant?

If you did not use birth control you may be pregnant, if you have also missed your period. However nausea is a symptom of so many things that on its own it does not necessarily mean you are pregnant. Sometimes it will be the begining of your monthly friend. Also your mind makes you worry so much that it wants to believe you could be pregnant so you start developing symptoms. The best thing to do is just not have unprotected sex or take extra procautions.