Am i pregnant, or is this just normal?

Okay so i'm 15, and me and my boyfriend had a month and a couple weeks ago? like three times in a week, yes i know stupid. But ever since i missed my period which i was suppose to start two weeks ago, i've been very tired and dizzy. Also, i get really bad pains out of no where and i pee a lot. And my emotions are out of control, and i am never hungry and when i eat i get sick...could i be pregnant?