I had unprotected sex(pull out method) on 9/8 an i was fertile. my period should start around 9/21. i have been cramping,nausea, vomiting. pregnant?

Infection: No. These cannot possibly be signs of pregnancy. Remember in high school when you learned that a new fetus is undetectable by the mothers body until about two weeks after conception? Your symptoms sound like a urinary tract infection.

Very possible : Nausea could be from pregnancy. Check a pregnancy test to be sure. it's important to know earlier rather than later if you're pregnant and don't want to be. despite access issues across the country, abortion is safe and legal. If you want to be pregnant, congratulations & start prenatal vitamins. The over-the-counter urine pregnancy test is usually positive 10 to 12 days after unprotected sex