Not sure what’s going on

I woke up at 4:20am to my dad choking and my mom hitting him on the back to get him to breath. A few months ago, he had choked on something while eating, and we couldn’t get a breath out of him for 3 minuets.

Anyway, he had gone to bed after eating something last night, and all of a sudden woke up choking. I’m thinking it’d backup of stomach acid, sleep apnea, or laryngospasm. I wish he’d see a doctor, because I’m scared of it happening again...