The Second person of the Trinity didn’t come into existence when Mary conceived.
Christ, as part of the Trinity, existed without beginning as the Father and the Holy Spirit. He appears at several times in the OT in a theophany.
She gave birth to the physical body He lived in on this earth. She did not give birth to His spiritual nature.
What part Christ physical body was NOT fully God,dear Sister?Christ was fully God and Fully MAN and His Mother is Mary as Scripture says.
You are devaluing the Incarnation just like Nestorious did
Read about nestorian theology for yourself and see the mistake you’re making,dear Sister
http://www.nestorian.org/nestorian_theology.html