When Paul wrote 1 Thessalonians, he believed exactly what
you do U.K. Read chapters 4 & 5. Chapter 5:3 "Whenever it is
that they are saying: "Peace and security!" then sudden destruction is to be instantly upon them just as the pang of distress upon a pregnant woman; and they will by no means escape."
By the time 2 Thessalonians is written Paul has revised his thinking somewhat (see chapter 2)
In 2 Timothy 4:6 Paul comes to the stark realization that he will
not live to see the second coming of Christ. "For I am already being poured out like a drink offering, and the due time for my releasing is imminent. I have fought the fine fight, I have run the course to the finish, I have observed the faith."
The early Christians, as did Paul, expected to see Christ come again
in their lifetime. It didn't happen. And in every subsequent age
until ours there have been those who see it just around the corner. And it still has not come. Of course, that is not to say, that it
will never happen. But it will only come when God is ready.
Nothing anyone says or does will hasten it. So why be anxious about
something that you and I have absolutely no control over? Can you
die with faith, as Paul did, even if it doesn't come in your lifetime?