Although I respect your right to hold that opinion, I must mention that it is an opinion, and one this guy disagrees with.
http://www.watchmanbiblestudy.com/biblestudies/Definitions/PreTrib.htm
I post that because his story is rather similar to mine. I was a member of Assemblies of God for 18 years and was a pre-tribulationist at first. It is what they taught. Then I started studying on my own and reading various opinions and interpretations. I became a mid-tribulationist or, what the site above calls “post trib, pre wrath”.
Well since we can know the signs of the season but not the day nor the hour, I have to go with a pre-trib rapture.
How can the rapture be a surprise if it is mid-trib or post trib? The 7 years tribulation starts with a peace treaty between Israel and the Anti-christ. Exactly 3.5 years into this ‘peace’ the Anti-christ sets himself on high in the new temple to be worshiped as God, and at the exact end of the 7 years Christ returns with the church. Doesn’t matter one whit to me what any expert says if it flatly and directly contradicts the Bible.