Corinthians 8:6 "Yet for us there is one God, the Father, from whom all things came and for whom we live; and there is but one Lord, Jesus Christ, through whom all things came and through whom we live." This would have been an excellent time for Paul(A.D. 55) to explain your trinity theory.
John 1:1 "In the beginning was the Word, and the Word was with God. He was with God in the beginning . John could have explained it here also.(A.D. 70/90)