It's possible that you're experiencing some protein deficiency based on your symptoms. To see this, you need to run some medical tests. You need to run blood tests, urine tests, cBCs, and measure glucose levels. You can also need to run electrolyte tests and start supplements of intravenous fluids as part of the treatment. You can also reserve sessions that will help you deal with the emotional effects of disease.
I recently felt extremely weak and my muscles didn't develop as they used to, and I'm tired most of the time.