About 30 Minutes Ago My 15 Month Old Son Was

About 30 minutes ago my 15 month old son was choking on a piece of a chicken nugget approximately 1/4 to 1/2 inch in diameter. My husband was patting his back to try and get him to cough it up but he ended up swallowing it whole. He seems okay now but his breathing was a bit labored and wheezy for about 10 minutes. I don't know if that was just because he had worked himself up so much or if he had a partially obstructed airway. Like I said, he seems fine now. He is running around, playing and laughing. Do I have anything I need to be concerned about or to watch for?