I was laughing while drinking and probably absorped some or juice into my lugs. I started to cough. Now after 1 hour I'm still coughing and have phlegm?

Normal. Your lung is trying to get rid of all the ingredients in what you ingested. The build up of mucous is from the juice irritating the cells lining the lungs and some white blood cells involved in the process. If it persists for more than 24 hours, see your doctor.