The rapture is term (not in the Bible) invented by some reformers in the late 19th century… there are scriptures in Revalation that with a beer or two in you, you could probably make a case for Rapture… but no serious theologian buys it…
There’s also a parable and I can’ find at this moment that makes a case for Rapture if you need it to fit…
My biggest problem with Rapture is this big battle that Christ is supposed to have with the Devil… It doesn’t wash… God will wash him into hell with a thought, there’s no need for any gathering in the field of the forces of good and evil… that battle is being waged right now…
when the trumpet blows, and Jesus returns the judgment will be made… i really don’t think you need to worry about left behind and all that wash…
Get yourself ready now, and you won’t have to worry later… keep fighting the good fight and running the good race… Love God with all your heart, mind, body, and soul… Love your neighbor as yourself… the rest is gravy…