From a nutrition point of view, your irregular sleep and meal schedule can definitely contribute to gastritis, acidity, bloating and reflux, especially when you have a long gap after waking and then have a large meal, followed by dinner around midnight. However, the episodes of chest heaviness, difficulty breathing and nervousness—especially when triggered by stress or a particular scene—should not automatically be assumed to be gastritis or anxiety.
Next Steps
Since you are experiencing chest symptoms and breathlessness, please discuss these episodes with your doctor and get properly evaluated. If you develop severe/persistent chest pain or pressure, significant difficulty breathing, fainting, sweating, or pain spreading to the arm/jaw/back, seek urgent medical care.
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Health Tips
Gradually regularize your sleep schedule; aim for 7–9 hours.
Avoid long gaps between meals; eat smaller, balanced meals.
Keep dinner at least 2–3 hours before sleeping.
Limit spicy, oily/fried foods, caffeine, and carbonated drinks.
Avoid lying down immediately after meals.
Stay hydrated and eat slowly.
Maintain a food + symptom diary to identify triggers.
Since you have chest heaviness and breathing difficulty, follow up with your doctor rather than assuming it is only gastritis or anxiety.