YOU SAID:

I need to go to the rest room.

INTO JAPANESE

私はトイレに行く必要があります。

BACK INTO ENGLISH

I need to go to the bathroom.

INTO JAPANESE

トイレに行きたい

BACK INTO ENGLISH

I gotta go to the bathroom.

INTO JAPANESE

ちょっとトイレ

BACK INTO ENGLISH

I gotta go to the bathroom.