__you told me,I heard nothing of what happend.线上填until,

__you told me,I heard nothing of what happend.线上填until,
__you told me,I heard nothing of what happend.
线上填until,

__you told me,I heard nothing of what happend.线上填until,
你把这两个分句倒一下顺序
I heard nothing of what happened until you told me.
not…until是固定搭配（本句not用nothing 代替）
句意是,你告诉我之前我对发生了什么一无所知