i bought my first bow, it is a parker buckhunter xp.  it seemed kind of loud and has quite a bit of vibration but what did i know, it's my first bow.  as i kept shooting it, it seemed to get louder with more and more vibration.  upon looking at it, i discovered that at full draw, the string, about two inches up from the cam is bent.  still not knowing too much about bows i figure that is what is causing the loudness and vibration.  what might cause the string to do that? it seems obvious that i need a new string but is that all that is wrong or might it be something else?