YOU SAID:
I must go to the potty
INTO JAPANESE
私はトイレに行かなければなりません
BACK INTO ENGLISH
I have to go to the bathroom
INTO JAPANESE
トイレに
BACK INTO ENGLISH
I got to piss.
INTO JAPANESE
トイレに
BACK INTO ENGLISH
I got to piss.
That didn't even make that much sense in English.