There's been a lot of abdominal pain, tiredness, a lot of sleep ...

Dr. For some time I have been experiencing abdominal pain, tiredness, a lot of sleep, difficulty in reasoning, lack of appetite and sometimes headaches and nausea. I have done several tests, some blood, others to check the thyroid, US abdominal, etc. All tests are normal. I would like to know what it could be, what doctor to look for, since I was an endocrinologist, proctologist and gastroenterologist.
Expert answer:

Look for a good general practitioner or a homeopath or a psychiatrist, do not look for tests to look for a cure for your symptoms, probably the answer is quite simple. It is not allowed to provide diagnosis through the internet.