YOU SAID:

i just got stabbed in the back by tracey

INTO JAPANESE

私はトレーシーで背中に刺された

BACK INTO ENGLISH

I was stabbed by Tracy with my back

INTO JAPANESE

私はトレーシーに背中を刺された

BACK INTO ENGLISH

I was stabbed by Tracy on my back.

INTO JAPANESE

私はトレーシーに背中に刺された。

BACK INTO ENGLISH

I was stabbed by Tracy on my back.