Sentence 1: I was once stopped at immigration and almost not let in. 
 Sentence 3: Luckily I proved who I was though it was scary 
 Sentence 4:  They let me through but just barely 
 Sentence 5:  Ever since I have been nervous about immigration 
 Option 1: I was tired and my story was sloppy so they threatened to detain me. 
 Option 2: I think the officer was being racist, but he finally let me in.