Vehicle Shudder problems of the 2008 BMW 335

I was driving at 60 miles per hour on woodall rogers fwy in dallas, when my car started shaking and went into limp mode. I pulled over on the highway and could not get the car to start again. I had the car towed to BMW. They said it had nothing to do with a previous recall about the fuel pump and gave me a $3,000 quote. I had it towed to an independent shop where they replaced a water pump and other items. However, the recall information I have been reading describes exactly what happened to my car. Whenever I drive my car now and I accelerate, it still gives me an engine warning and starts shaking. I believe my car is "suffering" from the water pump issue.