For the over the past month I have had a bunch of things wrong. My head and body swell up off and on, blurred/double vision, dizzy and weak, extreme tiredness, sometimes my eyes feel like they want to roll back into my head, labored breathing, confusion, memory loss, coughing up black/gray mucus, coughed up blood once, extreme sensitivity to sound and touch, yet numb feeling all over. The ER doctor a month ago said I just had low oxygen levels in my blood and told me to take b12 and prescribed folic acid