After driving my car for a while whenever I touch any metallic object I get a shock... advise what's wrong with me?

This is not so uncommon. It happens to me too, when the humidity is low. There is nothing wrong with you... it's just static electricity from the friction of your rump on the seat and your feet on the carpet of the car.

Be careful to ground yourself, when this happens, before filling your gas tank. It presents a serious fire risk. This is why you stay outside, in the cold, until your tank is full. Going back inside your car increases the chance of static electricity starting a gas fire, when you return to the pump. With winter coming, and humidity dropping, this is important to remember.

The car is a negative ground system and you're such a positive person! Between you and your car it's just plain chemistry.