Yes Jesus pre-existed as God.
Let's look at this a little closer.
You acknowledge the trinity; in a form that does not undermine the oneness of God.
The Father is Holy Spirit
The Word is Holy Spirit
Holy Spirit is Holy Spirit
All three are Holy Spirit, and one God.
Now you say that Jesus pre-existed. Did the humanity, the body and soul of Jesus pre-exist?
To me, Jesus is the humanity born of Mary. Christ is the anointing, the Holy Spirit that came upon Jesus at baptism.
When the Holy Spirit came upon Jesus at baptism, he became a mediator. He became 100% human, and 100% God.
At crucifixion, the body of Jesus was put to death. The soul of Jesus descended into the grave. Three days and three nights later, the Spirit of God, which had left Jesus at crucifixion, returned to raise the soul and body of Jesus in an immortal, spiritual, condition. Jesus Christ, the Son of man, then ascended to heaven to become King. From there, the Father and Son send the Holy Spirit upon the body of Christ, the Church.
This is my, simplified, understanding of the process.
By saying that Jesus pre-existed, you are telling me that the humanity of Jesus pre-existed, and this makes no sense. Did the soul of Jesus pre-exist and enter the womb of Mary? Did the soul of Jesus exist in heaven distinct from the soul of his Father? Please explain.