use this breathing method...breath in through your nose to the count of four then breath out through your mouth to the count of four...do this method four to five times...this is called combat breathing...it will calm your body down...then think about what you are about to say and how it will...
personally i don't believe that your life flashes before you when you are near death...everyone is different and the experience is different for each person...i have had the experience of near death...twice...and nothing flashed before my eyes except for darkness...both times...