我太累了，最后睡着了，但只睡了几分钟。

I am so tired that, finally, I do sleep, but only for a few minutes.

youdao

我不敢四处看，就闭上眼睛，一直静静的呆着不动直到最后睡着。

I closed my eyes without looking around and stayed there like that until I eventually did fall asleep.

youdao

最后她不知不觉地睡着了。

Finally she drifted into sleep.

《牛津词典》