He told us there would be “birth pangs” BEFORE the great and terrible “day of the Lord” - before the GREAT TRIBULATION which is what that refers to -
Go read Zephaniah.
Go read Daniel chapter 7.
Go read Revelation Chapter 14.
Just for starters.
Indeed I have read the entirety of the scriptures cover to cover more than once.
Now your turn, read history.
The world has been ravages by far worse than what we are seeing now.
The Plague, World Wars, massive epidemics, floods, famine earthquakes...
And with each there were those who told everyone including God the end was near...
He will let us know, trust me.
This is but a blip on the radar screen.