Bloating doesnt sound like die off to me. More like a food reaction imo. With me that happened with meat, eggs, or yogurt. So heavy food.
Are you taking care of your liver? Dark circles around the eyes could point to liver toxin overload. And if its not that, it is worth investigating whats wrong thats causing it.
You are quite disciplined. Keep it up. Though I would say, if you eat too much of one thing you might develop an aversion to it. That would make the diet harder to keep up, as it can go as far as cause gag reflexes. For instance, i cant eat buckwheat anymore because of that.