YOU SAID:

I would've lost my head if it weren't attached to my head

INTO JAPANESE

それが私の頭に付いていなければ、私は頭を失いました

BACK INTO ENGLISH

If it was not on my head, I lost my head

INTO JAPANESE

それが私の頭の上になければ、私は頭を失った

BACK INTO ENGLISH

If it was not on my head, I lost my head