Loss power wont start maybe exhaust or catltic ?

I had a chevrolet cavalier once that had a clogged exhaust. i was driving and the catalytic converter fell apart, and clogged the exhaust system. I completely lost power, and barely got home. Try getting your arm under the car, and hit the catalytic converter with your had, or a mallet. If it has fallen apart and failed, you should hear a clattering sound. Try inspecting the whole exhaust system, looking for bends in the exhaust pipes. When my catalytic converter failed, i also heard a hissing sound when it was running, and the engine was slightly overheating because of the restriction in the exhaust.
!!GOOD LUCK!!
Matt