Problem Solved: Though I hadn't noticed my mouse misbehaving in other programs, up until today, I did notice it when I was playing a game (BF4) earlier. First thought I was going to have to replace the mouse, but after repeated multiple quick pushings of the right mouse button, it seems to be functioning normally, once again. Yeah! I guess the switch had possibly became a little dusty, or there was something under the button which was preventing it from consecutively depressing completely. Thank you all that replied.