Rolex runs down

Question

After winding my self winding watch and wearing it during the day, it stops running after two or three days and has to be manually rewound. My husband's Rolex never has to be rewound. On my Rolex it acts like the self winding feature is not working properly. When I take it to the repair shop I am told nothing is wrong and they say I have to wind it. This I don't buy. Any suggestions?