Vodka kills bacteria. All bacteria, including good ones. So best avoid it. Makes no difference whether vodka is quality or not, alcohol is toxic to the body either way. Personally, sometimes, quite rarely, I drink some alcohol myself but I keep to wines and sweeter stuff that taste nice.
Antibiotics also kill all bacteria, so best avoid this too.
How much water do you drink? Perhaps drink a bit more than you think you might need? To make sure your body definitely has enough. Clean and safe water.
Deficiency of water could contribute to some symptoms you described.
Baking soda should be good against fungus. Perhaps try drinking water solution of this? Might help.
Personally I make a mix of magnesium chloride, potassium chloride, sea salt, baking soda, borax solution and drink it every day (Mg, K, Na, Cl, HCO3, B). Fungus definitely hates this stuff.
Magnesium and potassium deficiency could as well contribute to the symptoms.
Then calcium. I eat ground egg shells each day to ensure my body has enough.
Then iodine. Though you said you eat sea vegetables... Then how much? Each day, every second day, third, fourth, etc? As iodine deficiency could as well contribute to these symptoms.
Not to consume too many sugars. Maybe maximum 40-50 grams (about 1,4-1,7 oz) a day.
Binging on fruits is bad. The excess sugar and fiber you get from them is what definitely can make antisocial and make the brain stop working and all the rest (I've had this).
Definitely try to keep some hours between mealtimes, no snacking in between either. Drinking water and mineral water is okay in between, but no food.
Also try to not eat right after waking up nor right before going to bed. Again best to keep some hours (about 2-4) in between waking and eating and eating and going to bed.
And try to eat 2 times a day, and some days perhaps one meal. Rarely 3 times, if at all.
This would ensure you don't overstress your digestive tract and give it plenty of time to repair itself in between meals.
And maybe try to rely for a time on easier to digest foods as the bulk of your diet? Like fish and eggs and whatever else is easier.
Garlic and turmeric should be good for immune system.
Sunroot is something I personally like a lot, and is good for the gut in my experience.
And sunlight, plenty of sunlight.
I've now read really good stuff about hydrogen peroxide, but haven't tried it myself yet.
And raw cannabis, haven't tried this either. Don't know where to get it. Probably have to grow myself next year if can get seeds from somewhere.