Left-side chest pain Causes. Is it heart Pain?

What are the most probable diagnoses for a generally healthy adult experiencing left-sided chest pain?
What are the hallmark symptoms and signs for each of the top diagnoses?
How does diurnal variation or correlation impact the perception of pain for these conditions?
What specific diagnostic criteria are essential for identifying each of these conditions?
Why is accurate diagnosis crucial for conditions like pleurisy and GERD?
Important Highlights:
Musculoskeletal pain, with a 30% likelihood, usually presents as benign and self-limiting, mitigating the need for invasive interventions.
GERD accounts for a 25% probability and is characterized by stomach acid flowing back into the esophagus, potentially leading to complications like esophageal stricture.
Anxiety or Panic Disorder, having a 15% chance of occurrence, presents with non-specific chest pain that can mimic heart-related issues, making diagnosis challenging.
Myocardial Ischemia or Infarction carries a 5% likelihood and requires immediate attention due to its life-threatening nature.
Pleurisy, with a 10% chance, manifests as sharp, stabbing pain exacerbated by breathing, and is crucial to diagnose to avoid overlooking underlying conditions or complications.