YOU SAID:

I feel as though I may fall asleep at any given moment.

INTO JAPANESE

今にも眠ってしまいそうな気がします。

BACK INTO ENGLISH

I feel like I'm about to fall asleep.

INTO JAPANESE

眠ってしまいそうな気がする。

BACK INTO ENGLISH

I feel like I'm going to fall asleep.

INTO JAPANESE

眠ってしまいそうです。

BACK INTO ENGLISH

I feel like I'm going to fall asleep.