YOU SAID:
what the heck is going on inside your head
INTO JAPANESE
あなたの頭の中で一体何が起こっているのか
BACK INTO ENGLISH
What the hell is going on in your head?
INTO JAPANESE
頭の中で一体何が起こってるんだ?
BACK INTO ENGLISH
What the hell is going on in your head?
That didn't even make that much sense in English.