Am I pregnant I had sex for the first time 4 1/2 weeks ago and 3 times after that. I have really sore breasts and nipples. I have large breast idk?

Pregnant?? Let's see...If you aim a shotgun at your head and pull the trigger will you blow your head off? Of course if you have unprotected sex weekly and are a healthy adolescent female you will become pregnanteventually. Get a pregnancy test asap done and get a professional that will work with you regarding birth control and preventing std's.