YOU SAID:

im need to go to the bathroom

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

トイレへ行かなきゃ

BACK INTO ENGLISH

i have to go to the bathroom

INTO JAPANESE

トイレに行かなきゃ

BACK INTO ENGLISH

i have to go to the bathroom