Hello! I had gone through your query and understand your concern. There are many conditions that can cause weakness and feeling faint. If I were your treating doctor I would first rule out the most common causes. For this I would suggest to do some studies such as: -Complete blood count to exclude anemia (low red blood cells and low hemoglobin) -Blood sugar to exclude a Diabetes or Hypoglicemia. -Monitor your blood pressure to exclude a low blood pressure. If this test result are normal and this symptoms persist I suggest to consult a physician for further diagnosis and treatment. Meanwhile you need rest,eat healthy mostly green vegetables and drink plenty of fluids. Hope I was able to help you. Take care. Dr.Rovena