Depends; has this swallowing of a 목걸이 caused Pica syndrome, a disorder that involves an individual to eat non 음식 things such as metal, dirt, and plastic?
If not, don't worry about it. People eat weird and unusual things when they're you.
@16falloutboy So what if it was in your mouth? How did 당신 제비, 삼키기 it is what I wanna know. 당신 couldn't have swallowed an entire 목걸이 의해 accident -_- @Shadowmarioking Yes, it is indeed a 배 with a mouth :D