Every time you're tempted to eat gluten, think about what you've written here. Celiac is just one thing on the gluten-free scale. Non-celiac gluten sensitivity is just as real as any other illness, and should be treated as if it were celiac. No gluten. No king cakes -- I get temptation, but when it (now rarely) hits me, I remember how sick I was. There is no food in the world worth going back to that. None.
Now, it's possible you may have other issues in addition to gluten, and that you should see another doctor, one who is willing to focus on your problems. Not every doctor is a right fit for a patient, and not every doctor has a full understanding of auto-immune diseases like celiac.