YOU SAID:

I am tired because I went to sleep at One last night

INTO JAPANESE

最後の夜、眠りに行ったので疲れた

BACK INTO ENGLISH

I'm tired so I went to sleep last night,

INTO JAPANESE

私は疲れたので、最後の夜を寝る

BACK INTO ENGLISH

Sleep last night because I was tired

INTO JAPANESE

疲れていたので、最後の夜を眠る

BACK INTO ENGLISH

Sleep last night because I was tired