In my opinion the psyche disorders you mentioned pretty much can have overlapping symptoms and causes, so it doesn't surprise me that you have symptoms from all of them. We are using vitamins and diet to treat our son who has a problem with psychosis. His isn't officially diagnosed with schizophrenia because we aren't taking him to a "regular" psychiatrist, but an orthomolecular psychiatrist. If you are interested in learning more about this approach you can do a search on schizophrenia orthomolecular. It is best to go to an orthomolecular doctor if you can afford and find one, but not everyone can and it never hurts to try taking vitamins or try changing your diet to see if it helps. Dietary changes are needed because some people have allergies to gluten or some other common food that they eat all the time or hypoglycemia can cause a lot of these symptoms or others, like my son, are affected by candida overgrowth. (candida also caused a lot short term memory loss and brain fog in my son, but that went away after he took diflucan to help kill the yeast. Have you ever in your life had a lot of antibiotics? This is how the candida problem starts for most people because the antibiotics kills the good bacteria in the digestive system and allows the candida which is normal to be there in small amounts to grow out of control.) If my son eats something with sugar in it two days later his symptoms are much worse.

As far as your other symptoms go, taking vitamin C should help with getting sick and also with the problem with skin healing. Do you know that inablility to heal is a sign of scurvy? A subclinical scurvy can be caused by a person not getting enough vitamin C. The illnesses and stresses you have can eat up a lot of vitamin C in your body. Cheap vitamin C works fine, but you should make sure to eat some fresh fruits and vegetables every day, too, because they have the bioflavniods and other things you need. Look up vitamin C bowel tolerance online to find out how to determine how much you need.

Another thing that can cause the problems with skin healing and weak immune system and also the fact that you have to drink so much water is diabetes. If you try the vitamin C for a few days (at bowel tolerance level) and it doesn't help, or if you don't want to try vitamin C you should be tested for diabetes. You should take sugar out of your diet anyway, because it makes most of the symptoms that you described worse anyway and it doesn't do any of us any good. Do you have to get up at night a lot to go to the bathroom? That can be a sign of diabetes, too, although I do that and I don't have it so it doesn't always mean that you have diabetes.