Likely hood of Pregnancy

Patient: How likely is it that regularly taken birth control pills, an unbroken condom, and pulling out before would fail to prevent ejaculation? I have been feeling nauseous for the past 2 weeks and I have been feeling tired for the past few days. I am not sure if this is because I have been stressing over whether or not I am pregnant or if these are symptoms of actual pregnancy.

Symptoms: Nausea, Fatigue