peace over stress

Lord, give me peace in my heart as I meet my Prof later. The stress is increasing and burdening my heart again. Logically, i know there's nothing to be afraid about, but my mind is still filled with worries and 'oh nos'. Father, give me peace in my heart and peace in my mind. Remind me that my thesis is in Your hands. Help me not to be lazy, drained, and tired. Help me Lord..