Try 'belly breathing' exercises at home.

    Breathe in deeply and slowly through your nose - about 5 seconds

    When your lungs are full, hold - about 1-2 seconds

    Notice any tension in your body

    Exhale slowly through your mouth - about 5 seconds

    As you exhale, allow your muscles to relax

    When your lungs are empty, hold - about 1-2 seconds

    Allow your body to sink into your chair just a bit