2003 Chevrolet Trailblazer • 110,000 miles

After driving my car for 20 minutes and stopping to chat with someone for about 5 with the car at an idle (running), it shimmed from side to side; I turned it off. Then I turned it back on after out conversation was over about 2 minutes and I put the car in reverse backed up then drove it approx 10 car lengths to my parking spot turned to the left to pull into my spot and my car started to lunge forward until I was all the way into the parking spot and I quickly turned off my car, I have not turned it on since. I know that the clutch fan is not working correctly. Could it be that it was getting to hot? I am at a loss. Please help and thank you.
January 7, 2013.

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