Alright my car was vibrating real when stop at a stop sign or stop light.

What is your question?

was told i needed a O-2 Sensor and Spark Plug.Then was told I needed the one the coil replace again no spark coming out of it.Did that but didn't replace Spark plug or wire but the vibration stopped a its not loud or shaking real hard anymore.Its just jerking real hard after I stop and start to accelerate.I also was told I need a catalytic convertor.I think thats what I really need.Do I need to get that and O-2 Sensor still and Spark Plug & Wire to be on the safe side