this is probably a dumb question, but when im breaking sometimes when i break a little hard when going a little fast it gots clunk clunk clunk should it be doing that? oh yeah my shit also squeeals when i break almost every time.. my breaks are less than a half a year old. is it just me or does something need to get fixed?

oh yeah and.. sometimes when im chillin outside of my car with some friends smokin a cig i hear my car makin some funny ass noises when its not even on.. does anyone know what it is? it sounds like an antenna is coming out or something.. haha but i dont have an exterior one?!