Where is the head gasket leaking oil? Provide pictures if possible.
Take your car to a car wash and use a pressure washer (leave the car running and avoid spraying water directly on the exhaust) to clean off your engine and see where the oil is actually coming from. It may just be a seal on the engine.
Generally if a head gasket is leaking you can get coolant into your oil and that will ruin your engine very quickly. Also the car will overheat which could damage it as well.