So nervous

I always freak out and worry. Every time. Me and my boyfriend have sex a lot honestly... and that also worries me but beside the point. Anyways, every time we have sex whether it be unprotected or protected he always pulls out when he's about to cum. But I'm always nervous about my period. Is that normal? Am I pregnant? I mean he always pulls out. I just hate the thought and feeling of being paranoid about not getting my period and being pregnant? Am I the only one??? Or am I really paranoid? ;/