2002 Buick Regal going crazy

A few days before it pooped out on me it had been cutting off while I was driving, but it would fire right back up. Then I started up one day and the engine was idling up and down, all the dash lights was blinking on and off, the odometer and rpm gauges was going back and fourth, it was making a ticking noise from the cabin, and the windows would go up and down intermintently when I tried to roll them down. I have heard its the pcm, ecm, bcm, ignition switch, maf sensor. Maf had already been replaced approx. 5000 miles ago. Please help im still paying notes on this car. And they wonder why GM is bankrupt. Im an 60-70s Gm guy anyway, but gas prices made me buy this buick!