Some people with ADHD improved after removing gluten in their diets. The Cyrex Array 3 test could shed more light. You’d have to request it from your doctor.

... to be snorkeling in Hawaii.

I don’t know about EFT but to help develop impulse control, one method that might help is to set up intentional situations where you practice impulse control. Delaying eating a treat would work. Putting off a fun event until a chore or task is complete. The key is to “exercise” control, while imagining eating the treat or having fun later. You can read more about this in Richard Davidson’s book The Emotional Life of Your Brain, in chapter 11. Also, scheduling and monitoring tech time is a helpful skill to learn. I use the Moments app myself and try to keep my daily time low.

Harvard has studied it and says it works. You can find the study by googling. To help with sleep, you could also try listening to Marconi Union’s song ‘Weightless’ or pink noise. Both are on YouTube.

Generally, a diet that feeds your microbiome and maintains the mucus lining of the intestine is healthiest. Fasting properly is healthy, too, because it allows the body to “clean up” subcellular material which is otherwise inflammatory.