Why would i feel unsteady if there is nothing wrong with me ive never experienced anything like it before

Unsteadiness: Unsteadiness is an abnormal state and has various causes such as low blood pressure often accompanied by lightheadedness, neurological and muscular disorders affecting the legs,anemia,cardiac arrythmias, visual disturbances, intracranial pathology. Your MD can examine you, order pertinent tests and then advise you or refer you to an appropriate specialist.