Generally, had anything really tried to head down the wrong pipe, you would have coughed/choked and brought it back up. The glottis is there for that reason. It closes the airway so food doesn't get inside.
Can food get into your lungs? Yes. This is more often seen with people who have OD'd or are drunk or intoxicated though because like I said - cough reflex is very good in the normal adult. Worse case scenario is probably pneumonia. But it's highly, highly unlikely, and quite frankly, I wouldn't even bother worrying about it at ALL.