About the geographic tongue i read that it might disappear over time but the exact cause and what determines its apparition are yet unknown...
In regards to your diet, how do you eat those eggs? I understand the healthiest are hard boiled, which can be eaten more often, though sportsmen do it for energy purposes. I know that not eating more than a maximum of 3-4 eggs per week is more ideal. Are they only chicken eggs? We have quail eggs as well, which are believed to be much healthier and suited as treatment for a wide variety of respiratory problems. The origin of the food you are eating is by far the most important factor. If the chicken/beef meat was produced in one of those places where they get injected with tones of growth hormones and antibiotics, they are not going to help you much.
I am not an expert on nutrition, but I have managed to keep a healthy diet and never had any problems related or that stemmed from it, and this includes keeping myself physically fit as well. I am typically high-energy (i have a faster metabolism) and don't need things such as coffee or energizers no matter how little I've slept xD They just throw me off sometimes, or cause me to be sleepier. But I enjoy drinking a good coffee (with milk, and sugar...) once a month or even less. That's about how often i drink say wine or beer or whatever. And in small quantities... but then again, that's just me, i don't have to impose it upon myself, it's how I feel about it. I enjoy natural juices/smoothies much more, such as a combo of apple-banana-orange-beetroot-ginger. It is amazing. Or tea (a lot of Linden tea and some others where i was younger, we had a "family tradition")
I find that your own body and what it craves at times are the best indicator of what you lack or need, if you know how to listen to it. Well as a female I always kept a closer eye on my stuff. For example, I had a few (more) problems with the thyroid, do have more sensible lungs, and also had a few hormonal problems (breast cyst) which is kinda genetic. While at the moment none of them is causing me problems anymore, I haven't taken any hardcore medication either more than I tried eating/drinking the right things and exercising. Maybe this is why I'm not keen on coffee/alcohol/fatty or excessively sweet food.
The best advice I can give is try to keep it diverse and avoid those foods that are too high in energy or your doctor has told you not to eat. More than anything, try avoiding commerce meat/processed/canned food if you cannot find a local/trustworthy meat producer. Try more boiled or slightly cooked vegetables like carrot, home made tomato broth, bean pods. How do you feel about fresh fish meat (best are the oily/fat, cold-water ones)? Avocado? Nuts& seeds? rich in oils... almonds, walnuts, pumpkin and sunflower seeds, peanut butter? Are you avoiding fatty cooking methods and going instead for olive oil, steaming, baking, grilling?
How do you get along with dairy products (yogurt, milk, cheese)? Again, not those from packages and additives from supermarkets. More like the ones you can find in the open markets.
How do you drink your water? Bottled/filtered/directly form the tape?
Some doctors have started linking diet with your blood type as well, since it is a well known factor certain health problems have a bigger preponderance in those respective blood types and especially if the RH is negative.
I believe many health issues can be solved with a positive attitude and healthy lifestyle, and those that are genetic, kept in place this way.
More than anything though you should visit a medical specialist, maybe a Gastroenterologist. (unless the one you mentioned is already, but you can always look for a second opinion if you feel the advice you've been given hasn't helped you in the long run) I know there might be costs, but there will be higher costs if you leave anything that is affecting your life to such a degree untreated. Are you currently taking any kind of medication?
I understand living alone might be hard... in fact, emotional issues are the ones causing the real problems that manifest in the diet as well, in everyone's case Do you have a job, or are you looking for something? Finding something you can use your energy on but which will not press on your health negatively might help you more than you can imagine, and can also provide a social environment.