Well I posted a pretty comprehensive discussion on this topic here.

I also believed in the pre-trib rapture because it was so prevalent in the church. Of course, I never really studied that.

If you adhere to the pre-trib rapture theory, what I found is that several inconcistencies appear in scripture that are unresolvable. The bible appears to conflict on substantive issues. Some people can no longer hear the Lord because the most important doctrine to them is the pre-trib rapture. As the evidence above is presented, it becomes clear that the keys have been hidden all over the Bible.

The bad news I finally came to understand is that you have to misunderstand a lot of the Bible to adhere to the pre-trib theory. Sorry about that.