Swallowed a small piece of bread, went down the wrong pipe, not choking but feels weird, read about this possibly causing a bad case of pneumonia, ?

Aspiration: What you describe is an aspiration event. Usually, our reflexes protect our airway from foreign objects getting down into the lungs. Certain populations are at higher risk for aspiration pneumonia, usually due to a failure of these reflexes. I would monitor your symptoms and follow up with your doctor if you develop fever or persistent cough.