I had a friend who lived next to me with similar conditions, he was about 15 years old. He had a lot of weakness, stomach problems. Bloating in his stomach would cause headache. He would have bad itching in his body and his head (probably from the dryness), his hair were falling, and whenever he tried to stand up for a moment he said his vision and hearing would go away and he would see stars in front of him. Then they would come back. And his stomach problems would cause him headaches. The doctor in the government hospital here in India (who provide free treatment) did some blood tests and gave him some antibiotics. When it didn't work he just scolded his parents and told them to go away and just feed him well. Free health care can be like this in my country - there are just too many patients.

His parents could not afford private healthcare. So they decided to go to a local homeopathic doctor who used to charge half a dollar for a visit (compared to ten dollars for private doctors at that time which they couldn't afford).

Amazingly, it worked. It made him feel like going to sleep and the next day he was feeling maybe 50% better. Then he gradually became normal.

But placebo can be powerful. I have seen so many people cured by homeopathy - most of the times from problems that would need antibiotics or pain killers to cure, but sometimes other things too. Homeopathy is very popular in my country and there's a doctor or chemist selling homeopathy on every street.

Now I am not saying that it would work in your case, specially if you consider it to be a placebo and then that you already know it's a placebo. But it might be worth trying out.

You can do some research on the internet for the best homeopathic medicine for your symptoms. I just searched a bit for these symptoms and came across something called carbo veg. Maybe you can read about it and others, find one that you (and hopefully your subconscious mind) are convinced matches your symptoms and then take it. Order it in 30c, not even a single atom of the original substance is left at that point so what you chemically would have would be a drop of pure alcohol in water (hence it would not have any side effect). Ofcourse a homeopath would say that the water has magical properties , but all that doesn't have to matter. All you have to lose is maybe a few minutes of research to pick something that convinces your subconscious mind, and a couple of dollars for the medicine.

Just a suggestion.