“… now I can’t even breathe without pain, let alone exercise…. a pain in the lower abdomen that wakes me up at night, and trouble breathing. I am very depressed….”
I think that you need to see a medical professional in person. The symptoms sound severe enough that you should get tested to rule out possibilities other than your diet. The fact that your first 8 months on the diet didn’t cause these symptoms suggests that something else about your body changed.