I'm wondering if you're getting better being GF or not. It is possible to have the appearance of celiac because of damage done from untreated GP. I mention it as one of my endoscopies showed the appearance of past damage that's usually related to celiac, but I eat LOTS of wheat and yet it was healing. If the GF diet is helping I'm sure it will definitely be noticeable and helpful! The most important part of the GP diet is going low fat and low fiber, which is why you had problems with the orange. Since you're also taking out gluten, dairy, and soy, I'm not sure what's left. That's something to talk to your nutritionist about. Fat and fiber are the 2 most difficult to digest macronutrients, while protein is easier and simple carbs can actually be absorbed through the mouth. Your sparkpage isn't clear if you're here to lose weight as well, or just to learn to live with your conditions, so I won't recommend the use of simple carbs to continue your caloric intake.
If you haven't done so, I have other threads on our team that will help you to learn what foods your body will allow. It means starting with a minimal diet and slowly adding foods every 2-3 days. That way when you have a negative reaction you'll know the newest food you've eaten is the definite cause. Once you figure out a base of foods you'll always know what you can go back to if you have a flare.
One good thing to hold on to is that just because you have these conditions doesn't prevent you from exercising - as long as they are kept in control. Thus, once you get your nutrition figured out about what your body will accept you'll be able to slowly build back up to running. In fact, I read a story awhile ago about a woman who is a bodybuilder while she's on alternate nutrition (I don't remember if it's a G/J tube or TPN). As long as you get proper nutrition you can do anything!
If you have any questions, please let us know. Some of us have been living with this condition for years and can direct you towards answers.