I'm one worried mama! Has anyone else's infant woke up from a nap gasping for air? She is 6 months…

I'm one worried mama! Has anyone else's infant woke up from a nap gasping for air? She is 6 months old. She gasped and coughed a little bit but went right back to sleep. I don't know what happened. She hasn't done it since, but I'm still concerned.!