A childhood belief about afterlife

When I was about 9, my family moved. In our new home, we went to a church that focused much more strongly on the "end times" than our old church did. I was taught that when Jesus Christ returned to judge all men (the Rapture), the Christians would be taken up "into the air" (like the Bible says) in their own physical bodies instead of having to die first. I thought that if I was inside a building or underground at the time, I could not go to Heaven, because my body would not go through the material overhead and fly up into the air with God. I used to pray, terrified, every night for God to double-check to make sure I was outside before He started the end of the world.