Dispensationalism has been around for centuries... your church just nevere looked at it.
Sadly you are duped to the point of not even knowing the history of dispensationalism. It had it's beginning in 1830 with a vision by a Roman Catholic girl named Margaret McDonald in Glascow, Scotland and was run with by John Nelson Darby, and later Scofield in the US.
Please get your facts straight.
20But now Christ is risen from the dead, and has become the firstfruits of those who have fallen asleep. 21For since by man came death, by Man also came the resurrection of the dead. 22For as in Adam all die, even so in Christ all shall be made alive. 23But each one in his own order: Christ the firstfruits, afterward those who are Christ's at His coming. 24Then comes the end, when He delivers the kingdom to God the Father, when He puts an end to all rule and all authority and power.
This is so clear -- there is one "coming" which will include the resurrection/'catching away' (read the rest of 1 Cor. 15). "Then," Paul says, "comes the end."
Now what could be any plainer?
Every prophetic school of interpretation (premil, postmil, & amil) all taught this until Darby came along! There is not one passage of Scripture that does not fit with Paul's scenario. Furthermore, many other passages also teach that the resurrection (remember: one event with 'the rapture' per 1 Cor. 15) occurs at His coming.
John 6:39;
39This is the will of the Father who sent Me, that of all He has given Me I should lose nothing, but should raise it up at the last day.
There is only one Final Judgment -- at which both believers and unbelievers will appear. The righteous and the wicked are separated at His coming per Matt. 13;
24Another parable He put forth to them, saying: "The kingdom of heaven is like a man who sowed good seed in his field; 25but while men slept, his enemy came and sowed tares among the wheat and went his way. 26But when the grain had sprouted and produced a crop, then the tares also appeared. 27So the servants of the owner came and said to him, "Sir, did you not sow good seed in your field? How then does it have tares?' 28He said to them, "An enemy has done this.' The servants said to him, "Do you want us then to go and gather them up?' 29But he said, "No, lest while you gather up the tares you also uproot the wheat with them. 30Let both grow together until the harvest, and at the time of harvest I will say to the reapers, "First gather together the tares and bind them in bundles to burn them, but gather the wheat into my barn.""'
Notice that the wheat and tares are gathered at the same time, and not some mythical separate stages as taught by dispensationalism.
Matthew 25:31-46;
31"When the Son of Man comes in His glory, and all the holy[c] angels with Him, then He will sit on the throne of His glory. 32All the nations will be gathered before Him, and He will separate them one from another, as a shepherd divides his sheep from the goats. 33And He will set the sheep on His right hand, but the goats on the left. 34Then the King will say to those on His right hand, "Come, you blessed of My Father, inherit the kingdom prepared for you from the foundation of the world: 35for I was hungry and you gave Me food; I was thirsty and you gave Me drink; I was a stranger and you took Me in; 36I was naked and you clothed Me; I was sick and you visited Me; I was in prison and you came to Me.'
37"Then the righteous will answer Him, saying, "Lord, when did we see You hungry and feed You, or thirsty and give You drink? 38When did we see You a stranger and take You in, or naked and clothe You? 39Or when did we see You sick, or in prison, and come to You?' 40And the King will answer and say to them, "Assuredly, I say to you, inasmuch as you did it to one of the least of these My brethren, you did it to Me.'
41"Then He will also say to those on the left hand, "Depart from Me, you cursed, into the everlasting fire prepared for the devil and his angels: 42for I was hungry and you gave Me no food; I was thirsty and you gave Me no drink; 43I was a stranger and you did not take Me in, naked and you did not clothe Me, sick and in prison and you did not visit Me.'
44"Then they also will answer Him,[d] saying, "Lord, when did we see You hungry or thirsty or a stranger or naked or sick or in prison, and did not minister to You?' 45Then He will answer them, saying, "Assuredly, I say to you, inasmuch as you did not do it to one of the least of these, you did not do it to Me.' 46And these will go away into everlasting punishment, but the righteous into eternal life."
Note especially the word "then" in Matt. 25:31. It is at this time that saint and sinner alike are judged, the same as in Rev. 20:11-15 (see also Matt. 16:27; 24:41-46; Romans 2:5-6; 1 Cor. 3:13; Col. 3:4; 1 Thes. 5:1-10; 2 Thes. 1:1-10; 2 Tim. 4:1; Heb. 9:28; 1 Peter 5:4; 1 John 2:28; 3:2).
The Second Coming is on the same day as "the day of judgment" (2 Peter 2:9). It is at this same Judgment that believers are found written in "the Book of Life," unbelievers are cast into "the lake of fire/Gehenna", believers are rewarded, etc. Different terms do not different judgments make! Rather, such terms highlight different aspects of one and the same Judgment.
Dispensationalism read their own eschatological construct into the Scriptures instead of letting the Scripture speak plainly, and thus twist them to satisfy their false teaching.