1995 Chevy Suburban my truck battery keeps dying

I went to the laundry mat about 4 miles away truck ran fine came out maybe 2 hours later tried starting it and it just made a repeated clicking noise I got out popped the hood moved battery terminals and the truck started while I was driving home the temperature gauge went all the way up and the oil gauge went up and battery gauge was jumping but the truck didn't over heat made it home battery wasn't reading the normal 14 I turned the truck off and tried restarting it and it just made the clicking again got out and repeated the earlier steps with the terminals I then got pliers and tightened terminals and the key wasn't in the ignition and truck started to make a weird noise I loosened the terminal and it stopped what does this sound like to you?