My period ended on the 13th of this month and 2 days later, my boyfriend and I had sex. We used a condom and it broke midway but he didn't ejaculate inside of me. 5 days later, I experienced very little dry-vaginal discharge that looked like black, crumpled internal tissue. Later that day, we had unprotected sex and he was inside of me for 20-30 seconds. He didn't cum but he released some pre-cum. I felt like throwing up twice today and the left part of my abdomen feels a little weird. Other than that, I feel normal. Am I pregnant? What is my percentage chance of getting pregnant?