My hard drive is clicking?

My computer was working fine until i drove all the way to my brothers house with my computer. I started it up and my hard drive was making this clicking noise. I couldnt get to my desktop. One of my brothers friends unplugged some cords, tried some stuff and then just plugged everything back in and deduced that my hard drive has failed me and i needed a new one. However, i tried turning it on again and now my computer is working fine. Earlier today i was on my computer and i heard it click once. Everything froze and i couldnt do anything. Then after a few seconds everything resumed working order. Id hate to think that this hard drive is bad since this is a new computer. Could it be doing this because its too hot in my brothers room? Is it "the click of death"?