Is it normal to not throw up after a week of having sex and still get pregnant?

Im kinda shaking and twitching. I get this feeling in my throat and my stomach is making noises and im not hungry. As i breathe, i start shaking. Ive never been pregnant so i obviously dont know the symptoms. I dont get my period til the end of the month so for the first time, i hope it comes. But i also heard you can still get it and be pregnant. Thats why i wanna know if you havent thrown up or just dont,is it still possible? I swallow and feel like throwing up. You know whats even more horrible? Is that i dont even know if i had sex. I was buzzed and hooked up with a guy hoping he was just fingering me. I was ok til today when i started feeling like this physically. Then horrified, i remember last weekend and im like no it cant be, it just cant, thats helarious. Ummmm im scared.