YOU SAID:

I was sucking something when it started squirming in my mouth

INTO JAPANESE

何かが口の中で鳴り始めたときに吸っていた

BACK INTO ENGLISH

I was smoking when something started ringing in my mouth.

INTO JAPANESE

口の中で何かが鳴り始めた時にタバコを吸っていた。

BACK INTO ENGLISH

I was smoking when something started ringing in my mouth.