After recovering from ADS (acute dyspnoea syndrome), you may sometimes feel breathless while sleeping if your lungs or heart are still recovering. Lying flat, poor sleep posture, or mild inflammation may trigger these episodes. Try sleeping with your upper body slightly elevated, avoid heavy meals or alcohol before bed, drink enough water, and do gentle breathing exercises. It is important to consult your doctor for a sleep study or lung function tests to rule out any underlying issues and receive appropriate treatment.