2003 Honda Accord drivetrain & axles problems

I was traveling on the interstate and my gas pedal locked, then my steering system, followed by the gas pedal. I was surrounded by huge trucks and was traveling with small children and was able to stop the car. I then repeatedly smashed the brake pedal and forced the steering to stir me to the side of the road the car went into the ditch and came to a fairly abrupt stop. When I arrived to the dealership, they told me that it was a problem with the alternator, but suggested that I should replaced the water pump.

2003 honda accord v6. Going approximately 70MPH on a major highway and the car violently downshifted as if I had slammed on the brakes. Almost hit by other cars on multiple occasions as the problem persisted. Also heard a whining noise/rattling under the hood while driving in 2nd gear. Once I smelled burning I knew it was time to give up. Had to get car towed an hour away.