If you have a thick white coating on your tongue, that's a bacterial fungal disorder, candidiasis albicans.
if you are binging on saltines and crackers, it's because the yeast in your body is craving carbs and sugars.
you need to immediately stop taking foods that are gluten, full of carbohydrates, sugars, and stop eating all fruits except for the sour fruits.
If you have that much bacteria in your body, and have a ton of gas, you could also be dealing with parasites.
The lack of oxygen, is because of the acidic environment in your body, and you are now oxygen deficient. I recommend starting on oral H202 therapy. This is water with an oxygen atom.
You need to focus on changing your diet, go on a cleanse, eliminating all sugars though except for the sour fruits.
I was in a similar situation. You may also have a build up of toxic emotions, that are accumulating and causing more severe congestions.
with your acid reflux, most of that will go away if you change your diet, however it's only the diet, you have to change your life.
For gas, lay down on your right sight with a hot water bottle on your stomach. Take deep breaths.
I would start juicing and drinking lots of lemon water, fresh squeezed lemon juice. lots of coconut products, very antiparasitic and antifungal.
Drink plenty of herbal teas, and water, stay hydrated, and I would look into h202 therapy, it's going to help kill any pathogens in your body.
What are you doing for holistic treatments? If you have the money go get colonic done, and ozone therapy.
focus on diet, herbs, and water therapy, like hot baths or saunas.
this releases the toxins.
rest as much as you can, and try to immediately drop everything and deep breathing where your stomach becomes tight in a knot, its the parasites and/or bacteria trying to fight with you and get your stomach in a poisoned conditions.
fresh aloe vera leaves cut open and blended with water everyday.
this is going to clean and gently repair your gut.
feel better soon, and let me know if you have anymore questions.