2012 Ford Focus cruise control problems

I was stopped, at a parking lot exit, waiting to enter a thoroughfare, engine idling, with my foot lightly on the brake. Suddenly, the car accelerated forward, into the traffic lane, as though someone had pressed the accelerator pedal to the floor, or nearly so. I took a 45 MPH "t" bone on my driver`s side door. I was shaken, but not injured and my elderly wife suffered a severe heart bruising from the seat belt. I was wearing a tight-fitting baseball cap, which was laying on the back seat.

While driving in stop and go traffic, my cars engine light came on, as I was accelerating to move forward in line a warning stating the transmission is overheating pull over safely for 8 minutes. This is the fourth time something has went wrong with the transmission since buying this car in september of 2012. The first time this happened I was driving on the interstate going 70 miles per hour and I didn't have anytime to pull over safely, I had to coast because my car was running but would not go forward.