Well you don’t need to start over again, you just need to continue to do what you are doing. I wouldn’t worry too much about the food allergies because they will be healed in time as your gut heals. I personally used to hyperventilate for 2 hours after eating some meals, so I would not worry too much about leaky gut because it’ll get healed in time.
For me the die-off period lasted 1-2 months and then it became much much better. One way to reduce die-off is to sweat out the toxins via a steam room, sauna, hot tub, jacuzzi, etc…this can completely eliminate or reduce die-off symptoms. You might want to join a gym, etc…a place where you can do this up to 6 days a week. You might find that you’ll feel much much better.
What supplements are you currently taking and what is your diet like other than those veggies?