YOU SAID:

i was thinking about what i thought to say what i was thinking about

INTO JAPANESE

私は自分が考えていたことを言うと思ったことを考えていました

BACK INTO ENGLISH

I was thinking what I thought I would say what I was thinking

INTO JAPANESE

私は自分が思っていたことを言うだろうと思っていました

BACK INTO ENGLISH

I thought I would say what I thought

INTO JAPANESE

思ったことを言うと思った

BACK INTO ENGLISH

I thought I would say what I thought