on one's chest
worrisome thoughts or feelings that one might need to share with someone else
I had a long talk with my friend last night because I had many problems on my chest.

[TahlilGaran] English Idioms Dictionary ▲

on one's chest
adj. phr., informal Hidden in your thoughts or feelings and bothering you; making you feel worried or upset; that is something you want to talk to someone about.
Jane looks unhappy because she has the quarrel with Susan on her chest.
"Well, Dave," said the coach, "You look sad
■ what's on your chest?"
Compare: ON ONE'S MIND.
Antonym: OFF ONE'S CHEST,

[TahlilGaran] English Idioms Dictionary ▲