2001 Volvo XC70 Vibration

Engine Mechanical problem
2001 Volvo XC70 All Wheel Drive Automatic 84000 miles

Hello:

I recently hit a curb pretty hard. Prior to the curb, it ran very smooth and quiet. From that point, it sounds and feels like an out-of tune 4 banger, versus the smooth and quiet 5 cylinder it was. No leakis just strong vibration throughout idle through freeway speeds. Did I mess up the timing belt? Counter-balance pulley? Alll?