Engine Noise problems of the 2009 Saturn VUE

I was driving on the highway, cruising at 70 in the far left hand lane, and suddenly my vehicle speed dropped to 40 mph and error codes started flashing on the dash (decrease engine, engine, stability track system, traction control, and others I don't remember). With semi trucks and a high volume of traffic behind me and blowing their horns, I attempted to change lanes in an effort to pull over on the right shoulder as georgia law states. . . But it would not accelerate and continued to decrease. It was by the grace of god that I did not get hit by the vehicles and semi trucks slamming on their brakes to avoid hitting me. I nearly missed the off ramp. Off on the exit ramp was not able to make the light so pulled over to right side. My car made a high pitched sound like it does when I really step on the gas, it was revving and now pulling forward. It continued to make this noise while I was at a stop light, not moving, tried putting it in neutral, park, nothing would make the revving stop. Finally, light turned green and the car jerked me forward but then would not accelerate again as I attempted to make it to the gas station off the exit. I pulled into the lot and again when I braked to put in reverse to park it started revving high and jerked forward again then backwards. I turned off the car and let sit 10 minutes. Turned it on, it would not go away the engine was in revving so high I thought it might blow. I turn the engine off and had the vehicle towed from 30+ miles away from home.