ok i got new breaks about 2 weeks ago.... i dunno whats wrong but everytime i stop they make this really loud screetchin noise anyone got any suggestions on what it might be the sound it comin from the front of the car and its horrible

 

are they semi-metallic pads? That could be why they are squeaking

 

Sounds like they didn't put anti-squeal on the backs of the pads.

Take the car back to the place where you had them done and have them fix it.