the white smoke coming from my blazer is getting worse, it used to only puff out a little when i reved it, now it smokes even at idle. its not much but i can see it. also, i felt the bottom of my exhaust tip and its damp. I'm pretty sure i blew a head gasket. Am I right? Also, I don't have another vehicle so am I safe to drive it (until next weekend) to school which is about 3 miles away or will I really screw up the engine? I just wanted to know if it is definitely the head gasket before I tear down the whole engine.