YOU SAID:

i need to goto the restroom

INTO JAPANESE

トイレに行く必要がある

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.