Erin, in response to your question catholism is christian. Any church that believes in Jesus and that he is the Messiah and rose from the dead is Christian. The two main branches are Catholic and Protestant. The Catholics have thier Patron Saints and Mary and such, the Protestant church focus more on the Trinity, Jesus and our relationship with Him. Having said that there are many demoninations within the Protestant church that put the emphasis on different parts of the Bible and its teachings. The United Church (here in Canada) is one of the most Liberal of the denominations, and the Pentecostal and Evangelical churches more conservative in their theologies. I am unsure how the CAtholic church is divided but I am sure you would find similar things happening there as you have many "orthodox" churches in that mix.
The Christian fiction books I read are just like the mainstream ones but the subjects and language are a little cleaner. For example there are no actual swear words printed, (you could have a character "curse" but all you see is the word "curse", ie John cursed at the TV), there are no intimate scenes between unmarried people, often there is a "church" involved with the characters and often one or more characters have a "relationship with God" as the main idea behind their character. Other then that they are about the same. I like to think of it a pure writing. I know the words but really don't have to read them. My favorite author is Dee Henderson. She writes alot a books that have "professionals" in them. Her one series is about a family that became a family when they all ended up in an orphanage and they decided to change their last names and become an official family. Twenty years later you meet them as they are professionals and each book focuses in on the job of one sibling. There are firefighters, doctors, cops, trauma psychologist, pathologist and a US Marshal. I call them romantic fiction. Her other series focuses in on the Military and the different aspects of that. One book deals with the fighter pilots, another the SEALS, and one deals with an FBI agent. Again probably falls under the genre of romantic fiction. When I am really sore I like to curl up with a good book that I can really get into the characters and I find it helps me to forget the pain.
Sorry this post is so long. Hope it answered your question. If not ask away, I do not have all the answers but maybe someone else here does. We do have to stay away from prosetilizing(?) but we can have honest "religious" questions. So long as no one is trying to "convert" someone the topic is safe. No one religion is right for everyone so we need to keep the discussion on a purely academic level.
Hope you are now pain free.
Worry not for tomorrow, for tomorrow will take care of itself.
Remember healing comes one step at a time, sometimes it seems that its one forward and 2 back but ultimately, always in a forward direction!!!