YOU SAID:

as I was falling asleep last night, I forgot what I wanted to tell you this morning

INTO JAPANESE

昨夜眠りについたので、今朝言いたかったことを忘れてしまいました

BACK INTO ENGLISH

I fell asleep last night, so I forgot what I wanted to say this morning

INTO JAPANESE

昨夜寝てしまったので今朝言いたかったことを忘れてしまいました

BACK INTO ENGLISH

I fell asleep last night so I forgot what I wanted to say this morning

INTO JAPANESE

昨夜寝てしまったので今朝言いたかったことを忘れてしまいました

BACK INTO ENGLISH

I fell asleep last night so I forgot what I wanted to say this morning