The thousand year reign has already happened, it was called Christian Europe. From the time of Constantine to the tragedy of the Reformation is roughly 1000 years, give or take a few hundred.
The only trouble with that is that I didn't see the Antichrist stand in the Holy Place, declaring himself to be God (as Jesus said, in referring to the abominatino of desolation in Daniel), and I didn't see the two witnesses, prophesying for 1,260 days and then dead in the streets of Jerusalem, laying there untouched for 3-1/w days, and then raised up in the sight of the whole world and taken up to heaven. And I didn't see the three angels, one of which declares the everlasting Gospel to the entire world to every person living at the time, and I didn't see the other angel, giving the warning to not worship the Antichrist and not take the mark of the Beast.
And I didn't see Jesus, the Messiah of Israel return and set up His rule in Jerusalem and Him seated on the Throne of David, and Israel ruling over all the nations of the world, and I didn't see the Antichrist and the False Prophet thrown directly in the lake of Fire, and I didn't see Satan bound up for the 1,000 years so that he couldn't deceive the nations any longer during that time, and I didn't see the end of all war, with full peace on the earth and none of the nations making war or learning war any more, and I didn't see the rebellion at the end of the 1,000 year Kingdom where all those millions rebelling against the Messiah of Israel, march on Jerusalem and I didn't see the fire of God coming down from Heaven devouring them. And lastly, at the end of the 1,000 year Kingdom, I didn't see the Great White Throne Judgement, in which all those whose names are not written in the Lamb's book of life are cast into the lake of fire... and lastly, I don't see that we are currently in the "eternal state" and that I have my new and glorified body...
From all that, I would say you've got the wrong time period... :-)
Or maybe you just don’t understand what you are reading? That is, the book of the Apocalypse is not straight forward reading, for anyone.
The verse about the Angel proclaiming the Eternal Gospel might be referring to Mother Angelica and her Eternal Word Television Network. But that is just a hunch.