MY CAR CUT OFF ON THE HIGHWAY.. I NEED HELP !

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TODAY MY CAR BEGIN TO JUMP AND THEN THE SPEED BEGAN TO DECREASE. ALL THE LIGHTS CAME ON AND IT CUT OFF. I TRIED RO START IT UP AND THE LIGHTS CAME ON AND IT STRUGGLED TO START. I GASED IT WHILE TRYNA START IT AND IT START BUT THE SPEED DECREASED AGAIN. NOW IT SEEMS AS MY BATTERY IS DRAIN AND WHEN I START IT UP ALL THE LIGHTS BARELY COME ON. IT MAKES A LOUD "TICKING NOISE". I DONT KNOW WHAT IT MAY BE. PLEASE HELP ME.