Addressing the OP, Tribulation or trouble, have been here since Adam and Eve disobyed God, and Great tribulation is not a one time event but over a long period of time. just as was in a topice about God's Love when Paul asked God to remove his thorn in the flesh, which was troubling him, and God refused, because his, (God), Grace was sufficient to perfect him.
and yes, we're in the Last days, Hebrews 1:1 "God, who at sundry times and in divers manners spake in time past unto the fathers by the prophets,"
Hebrews 1:2 "Hath in these last days spoken unto us by his Son, whom he hath appointed heir of all things, by whom also he made the worlds;"
so we been in the Last days, .... after the cross, (because we are in the GRACE period), and we have been in tribulation/trouble, there is no end of tribulation until the Lord returns. scripture, Revelation 1:9 "I John, who also am your brother, and companion in tribulation, and in the kingdom and patience of Jesus Christ, was in the isle that is called Patmos, for the word of God, and for the testimony of Jesus Christ."
tribulation don't only means one is in Jail, or prison, no. one can have tribulation in your home, or your local congregational church house of worship, or at work, or even in health, wealth, or spirit. today's one of the main or great tribulation area is in the home. be it, social, or financial, even political. yes, GREAT TRIBULATION, can be within our ownselves. but there is a solution. John 8:36 "If the Son therefore shall make you free, ye shall be free indeed." for, John 14:27 "Peace I leave with you, my peace I give unto you: not as the world giveth, give I unto you. Let not your heart be troubled, neither let it be afraid." BINGO.
oh yes, we will have trouble, (per the book of James), but we will overcome in him, (Jesus the Christ).
PICJAG.