I understand all too welll how you are feeling. I have a deskop and a laptop and my designs on an external hard drive and thumb drives. And I still get nervous. I hope your computer comes back good as new for a very long time and that all of your desigs are intact.
I know what you mean (and I have no smartphone, kindle or laptop - just my mac and me). Since I have my baby back with the new hard disk I'm busy opening folders to see if there is still something inside or if everything is gone :o(
Hope the best for your computer (it was the first time this happened to me since I have iMacs = last 10 years).
Greetings, Bettina
PS: Missed most sitting in front of my mac with a cup of coffee and chat here *lol*