An infant having aspiration related to GER may not have much symptoms in minor issues... they may just have history of reflux with arching and vomits. They usually have weight loss, once aspiration sets in they tend to cough and respiratory distress in severe cases.
Next Steps
I see regular questions from your side on this topic. Please approach a good paediatrician in your area and get all your doubt solved. If required, please visit a paediatric gastroenterologist.
Ask your doctor if work up for HPSS is required or not.