Hi, i'm 17 years old & i had sex the other day, but i'm scared i'm pregnant.. my boyfriend didn't cum in me & we didn't do it for long, it was fast, in & out & he didn't cum until he pulled it out.. is there a chance i could be pregnant? i'm scared & i feel kinda dizzy & really regretful! i'm really scared. please help me! i don't think i am, but the guilt & regret is killing me!