Am I pregnant, I'm 17? ?

so I had unprotected sex with my bf. We used the pull out method. I normally have irregular periods, I got mine this past month but it was not my normal flow. I usually bleed a lot & for 7-8 days. This time it was lighter & 5 days. So was it a true period?. & also some of my symptoms are, tender breasts, they ache more inside though. Servere headaches, I'm moody, for no reason. I've been so dizzy lately I feel like I'm in a daze, like I space out. I get the urge to vomit or do vomit at least once a day. I can't eat a full meal, or the foods that I normally love don't taste the same, & I can't eat them. I have pelvic bone pressure, that's the area right above the vagina right?. Well pressure there. I sometimes doze off in onversations. I have back pain & some cramps every now & then. I'm always tired.