well then it looks like you have a great start... the SC Diet is based around digestion. It is simple carbohydrate as you guessed, and has had excellent results with people afflicted with leaky gut and celiacs disease. And since you have issues with this, then you can just put it to the side.
The first thing I would suspect in your case is that the anti-biotics have lowered your liver function. And the ecology in your bowels as a result may have been altered.
Because of this I would suggest trying out food combining, and avoiding fried foods for now. It takes a load off of the liver, and might bring you a bit more comfort. The 80/10/10 diet might still help you, just stay clear of the simple carbs.
You may be able to get some help from Scareface101. He has alot of personal experience in the area of adrenal fatigue.