X over heating

[poppy400_0]

Today while driving my x the antifreeze bottle crack antifreeze went all over the place , what could of cause this? Anyway I went out and brought another bottle, I had it installed S0 far so good.now while driving I notice that my temp gauge starting rising toward the red so I quickly pull over for awhile.what could of cause this ? As I drive off the gauge is in the middle so I quickly accelerated to get home it stay cool as long as I was moving,as soon as I stop , it started to rise again. Do I tried something I turn on the heat and to my surprise the gauge went back to the middle .Can anyone help me with this problem.