I took my car to get it aligned today. Got it back and when i was driving home i notice the car starting to cut out and so i checked guages and right after that my temp. started to raise. So i pulled over and popped the hood and antifreeze was leaking out of the reservor tank cap. I would say to me head gasket but i was doing some reading and they said it dont happen much on these. Car has 40k miles. Replaced thermo and didnt help...Can anyone tell me for sure whats going on?