I Just Turned 60 And Have Very Stressful Job. I

I just turned 60 and have very stressful job. I get irritated easily with employees and client demands. I have trouble sleeping at night and am consistently tired. I have been married 32 years and my wife is always upset with me when i come home late. I work 12 hours a day and it is wearing on me. I dont have the right staff to be able to hand off most of responsibilities. I also am having trouble concentrating on work activities