Hi, Welcome to Healthcaremagic!
Symptoms you described may be due to an organic or psychological cause. Rule out anemia, thyroid problem, other endocrine problems, malabsorption
like celiac disease
, sleep apnea syndrome
, etc. so Ist consult a physician. If everything is normal, it may be that you are suffering from endogenous depression
or some other psychiatric illness; therefore a psychiatric consultation will also be useful. Now all disease can be successfully treated if a correct diagnosis is made.