I've noticed a significant loss of coolant (from max line to nearly empty overflow tank in 1 week) and have checked all the usual locations for leaks. I can detect a faint smell of antifreeze in the exhaust, and saw alot of white smoke this cold morning. My first question is, am I on the right track to suspect a head gasket problem? Secondly, what damage would I have likely caused driving this way for the past three weeks??? I plan to bring the car to the shop tomorrow. Thanks in advance. Any advice is appreciated, I hope to keep this car for a long time!