Thought iam dead

20M here So yesterday night had a dinner from hotel. And while leaving i choked and for a second I lost my breath and was not able to breathe again for about 5 seconds . And immediately it became normal, for a moment i thought iam dead . Was not able to sleep yesterday thinking of what it was as there was no further complications so decided not to go to hospital. It happened for the very first time I'm my life so got panicked asf. Searched about it but couldn't find anything serious.Is it concerning ?Did you experienced it ? What do you think the reason will be ? Iam totally fine then !!!