YOU SAID:

In the middle of the night I go walking in my sleep

INTO JAPANESE

夜の真ん中に私の睡眠中を歩いて行く

BACK INTO ENGLISH

Go walking in my sleep in the middle of the night

INTO JAPANESE

夜の真ん中に私の睡眠をお散歩します。

BACK INTO ENGLISH

The walk to the middle of the night in my sleep.

INTO JAPANESE

私の睡眠の夜の真ん中に歩いてください。

BACK INTO ENGLISH

Walk to the middle of the night in my sleep.

INTO JAPANESE

私の睡眠の夜の中を歩きます。

BACK INTO ENGLISH

I walk in my sleep at night.

INTO JAPANESE

私は夜に私の睡眠に歩きます。

BACK INTO ENGLISH

I walk in my sleep at night.