Let me put in here something more about the Trinity. This is not from my own thinking but from the Nicene Creed, a fifteen-hundred year old interpretation of Scripture accepted by most churches. The Trinity functions as three distinct persons though all share the full nature of God. Here is what the creed has to say about the character and roles of the three persons.
“We believe in one God, the Father, the Almighty, maker of heaven and earth of all that is, seen and unseen.
We believe in one Lord, Jesus Christ, the only Son of God, eternally begotten of the Father, God from God, Light from Light, true God from true God, begotten, not made, of one Being with the Father. Through him all things were made.
We believe in the Holy Spirit, the Lord, the giver of life, who proceeds from the Father and the Son. With the Father and the Son he is worshiped and glorified. He has spoken through the Prophets.”
Special Revelation is when God reveals to particular people information concerning himself and his purposes through various means of communication. The people who are given the special revelation range from individuals to all humanity. The various ways God communicates in providing special revelations are similarly wide.
Special revelation came through dreams and visions to two Josephs, one the son of Jacob and one the stepfather of Jesus. Daniel, Peter, Paul and John, in Revelation, also received special revelation by these means. Angels and people delivered God’s messages to Abraham, David and other kings, Mary, the mother of Jesus, and others.
Special revelation came to many people through direct speech including Adam and Eve, Cain, Enoch (this assumes he was told he was going to be taken to heaven before it actually happened), Noah, Abraham, Moses, Samuel, all the true prophets of whom we have knowledge, Ananias of Antioch, and many more.
The canonical books of the Old and New Testaments are “God’s preserved, and permanent revelation of himself to mankind.” (See section 1.4.)
I believe that special revelation has not ended. If I were to think so I would be saying that God was limiting himself and why would he do that when there are believers open to hearing what God has to say. This is not to say that every revelation that is claimed as of God is actually true. There are preachers, teachers, and self-proclaimed prophets who are deceived as to the source of their understandings and so mislead sincere believers