So I went to the races out here in Vegas last night for my first time...I ran REALLY crappy times by the way. But this morning I had to drive up to Utah and I noticed that my coolant overflow bottle was full and had spewed in the engine compartment. My temp was running a little hot but not too bad, a little over half way up the temp guage when it's usually a little below half way. I ran a 50 shot of nitrous last night and I'm wondering if I screwed something up really bad...a head gasket or something. How can I tell, I know it's a bad sign when the coolant is spewing. My oil is about a half quart low right now, it's a little dark. I run Mobil 1 Synthetic....how can I tell if I screwed something up????

UPDATE: I was just letting my car idle to see if it would spew the coolant again...and I went and looked in the car and my temp guage was pegged all the way up...what did I screw up????