YOU SAID:

I was sitting on the toilet and I had to take a doodie

INTO JAPANESE

私はトイレに座っていたと私はdoodieを飲まなければならなかった

BACK INTO ENGLISH

I was sitting in the bathroom and I had to drink doodie

INTO JAPANESE

私はトイレに座っていたと私はdoodieを飲む必要がありました

BACK INTO ENGLISH

I was sitting in the bathroom and I had to drink doodie