5 day post-op kidney donation update: Life hack, gurgles, anxiety, breathing, sensitive scar, sleep

Lifehack: I discover a simple life hack to make recovery easier.
Gurgles: The bizarre after-effects of surgery that gave me anxiety.
Anxiety: The physiological impact of anxiety and how it manifested in my chest.
Breathing: Simply using breathing deeply and heavily to increase the speed of recovery.
Sensitive scar: The discomfort of surgical scars.
Sleep: The magical power of decent, longer than 90-minutes sleeping.