@speed A little bit of flowers of sulphur will not harm you and likely get rid of a fungal infection, and you can use a little bit on the skin as well to help reduce acne.
Although your problems do not sound like they're fungal in nature. White tongue is mostly related to reverse peristalsis, endotoxin, and liver health.
I don't wanna just give you a list with things to buy but a waterpik to remove filth from in between the teeth, particularly the molars, might help to reduce the white tongue. Those flossing bows can do the job too but it's a bit harsher on the gums. Scraping everyday, gargling baking soda in warm water will help too. oil pulling once a week with coconut oil isn't a bad idea. Then mastic gum is a really good addition to help make your mouth hygiene better, and it has beneficial effects on the gut as well.
This is not medical advice but the antibiotics is a route i would inspect as well. It requires a lot of care not to overdo them. to balance the microbiome and i always take it with (weekly small amount of) sulphur so as to avoid strengthening fungus by getting rid of their natural competition.
I've had all of these symptoms you described and sometimes they pop up again, but you can change all of it. Shift the diet towards more solid foods is another suggestion i'd give. Godspeed