15 days late!!!

Royal

Hi! I'm 15 days late and extremely scared. Never skipped a period before except when I was pregnant the first time but I lost it at 4 months. I have been lightly nauseous and very tender boobs. Is it too early to take a test? Am I freaking out for nothing? Another thing is, his pull out game is strong so I'm not understanding how I could be pregnant. Really need answers. please and Thank you!