HI My Husband Been Sick For 3 Days Already And

HI my husband been sick for 3 days already and he doesn't wana to go to the doctor he start with body echache and then fever comes and goes he's not coughing or runinose ...and right now it's the weather is super cold and his sweeting a lot I ask him if he feels bad and he say no he just feel really tired Iam so worry because he never gets sick please help I been giving him the medicine call next for flu