Okay, so I went to the vet and had her fill out and sign the 7001 form (for the 3rd and last time!) and scheduled the tick and worm check. Next, I went to Petco to look for the travel crate. I love these guys! They put all the small pet shops out of business and they are absolutely useless when you need any real information other than "Where's the cat food aisle?" All they had were the hard plastic cat carriers with the metal grid door. This is probably not the one I need, right? If anyone has a brand they can recommend, then maybe I can order one online and get express delivery. I got the size requirements from Northwest Airlines, but they didn't really give an idea of what type of crate it should be.
Thanks, everyone, for providing so much helpful information and encouragement. I will be a nervous wreck until my husband calls me from England next week to say, "Everything's fine."