 [ Symptoms ] bad migraine for 4 days now been to er doc said he was not worried about it being anything serious still worried help  slightly relieved by tylenol but then returns feel constantly tired and stressed out worried about what is going on i just need some advice on what i should do [ Disease ] hi low rbcs and anemia cause low oxygen supply to the tissues due to diminished oxygen carrying capacity starting hematinic iron supplements will help you recover from these complaints thanks