Don’t forget the rest of the verses. At the Rapture most are taught that the dead in Christ rise first, yes? The verses you quoted state that those who die during the tribulation are resurrected. THEN the Bible states that the rest of the dead, those believers who did not die during the tribulaton did not rise until after Jesus rules for 1000 years. Read it all carefully. As one whole paragraph.
Vs 4 Then I saw thrones, and they sat on them, and judgment was given to them. And I saw the souls of those who had been beheaded because of their testimony of Jesus and because of the word of God, and those who had not worshiped the beast or his image, and had not received the mark on their forehead and on their hand; and they came to life and reigned with Christ for a thousand years. 5 The rest of the dead did not come to life until the thousand years were completed. This is the first resurrection. 6 Blessed and holy is the one who has a part in the first resurrection; over these the second death has no power, but they will be priests of God and of Christ and will reign with Him for a thousand years.
The first resurrection is only for those who die for their faith during the tribulation. The rest of the dead are resurrected at the completion of the 1000 years.
Anyway. Be prepared. We are called to take up the cross like Jesus did, not simply serve.
Are you absolutely, totally and completely certain that your particular interpretation of Verse is the only possible one, and are you equally certain that this beheading wouldn’t be regarded by God Himself as at least a small part of the end times tribulations?