My period is now about five days late, I've been having uterus pain and nausea for days now, yet not even a drop of bleeding. I have a lot of unprotected sex and I don't take any type of birth control, but from what I've known every time my boyfriend and I "do it", we've been safe if you know what I mean. But i'm still terrified because we've only been together for four months and I'm only 19 (almost 20).. should I take a pregnancy test? And what brand is better- first response or clear blue? I've also done some drinking and I smoke ciggerettes- which I plan on quitting regardless. I'm just super terrified to take the test, and super terrified for the health of what could be inside of me. Please someone give solid advice or comfort. Thank you.