NN

Cheryl,
I believe that you would agree that the being who we call “Christ” (as a title) existed in what you call “eternity past.” So the only possible contention you can make is that He is not properly called “the Christ” in the context of eternity past. However, since Paul explicitly & unambiguously does so this contention will not bear out unless you wish to maintain that Paul was wrong to do so. Nor ought this be surprising to us – throughout the Tanakh some of the synonymous ideas to the Messiah were “the Coming King” {2 Samuel 7:12–16, Jer 30:8–9, Zech 9:9, many other} and as the “Chosen One” {an idea implicit within the concept of “Messiah” – e.g. Isa 42:1}. And since He was “Chosen” & “Coming” since before the foundations of the earth it should be no surprise when we learn via Paul with absolute certainty that Jesus is properly called “the Christ” in the context of eternity past.