My Neck Is Stiff, All My Joints Ach, I'm Always

My neck is stiff, all my joints ach, I'm always exhausted. I'm sleeping fairly well, I had Kennedy failure last year brought on by blood pressure med. lisprinal, not taking any more. Was told this May I had low potassium was treated briefly. Dr. Has not had me back for retesting. I live with a lot of stress, my husband has dimenture and it's very demanding, not physically to much,very impatient like a child, mental stress is high. But I shouldn't be aching all over