There is a word for couples who practice the withdrawal (pull out) method of birth control - parents. Sorry, I don't mean to be a smartazz, but withdrawal is one of the least reliable birth control methods - right up there with the rhythm method. It's certainly possible that you might be pregnant, but it could be something else having nothing to do with your menstrual cycle. Your body is telling you something is wrong, and after two weeks of symptoms, you need to be evaluated by a doctor. Please make an appointment or at least go to an urgent care clinic if you don't have a regular family doctor. Hope you feel better soon. :-)
Well yes pregnancy is always a possibility when having unprotected sex. The pull out method can be very effective if done correctly but precum has semen in it that is capable of fertilizing an egg. Your symptom sound premenstrual but if you miss your period take a pregnancy test. Best wishes BB