The Tribulation described in Matthew 24, Mark 13, and Revelation is a literal 3.5 year period ( Daniel 9:27, Daniel 12:11 ), of the worst plagues, destruction and death ( because of God's wrath towards sinful mankind ) that the world has seen up until now. It will make the plagues of Egypt seem very small by comparison.
If we were in it, we as believers would know it... because we would be hunted, and anyone who will not take the mark will be sentenced to death.
Have you seen these come to pass, my friend?
" When ye therefore shall see the abomination of desolation, spoken of by Daniel the prophet, stand in the holy place, (whoso readeth, let him understand ) " ( Matthew 24:15 ).
" for then shall be great tribulation, such as was not since the beginning of the world to this time, no, nor ever shall be. And except those days should be shortened, there should no flesh be saved: but for the elect’s sake those days shall be shortened." ( Matthew 24:21-22 ).
" Let no man deceive you by any means: for [that day shall not come], except there come a falling away first, and that man of sin be revealed, the son of perdition; who opposeth and exalteth himself above all that is called God, or that is worshipped; so that he as God sitteth in the temple of God, shewing himself that he is God." ( 2 Thessalonians 2:3 )
I have not.
Again,
I've not seen what is described in Revelation 6 through Revelation 18 happen yet, and since the Gospel is still going forth, the end as not yet come ( Matthew 24:15 ).
How have you come to the conclusion that we are in it right now?
There is no temple to God ( yet ) in Jerusalem, offering sacrifices.