So tonight while driving home I stepped on the gas some. There was a clanking sound, not severe but noticeable, white smoke pouring out of my exhaust, once I stopped that car, on the driver side head, near the header there is coolant, and a small coolant leak under the car. Is this a cracked head? Blown head gasket? or what? I'm lost again, every time I turn around something else breaks, can anyone offer me hope that I don't need to do a whole rebuild again?