Hi, I am a 27yr old female who has struggled with have extra large red bloodcells and want to know what might be wrong with me and what might be causing this.I do not drink,My folate levels are fine,my b-12 levels were very low 3 years ago but we corrected that and i get them checked regularly,the are always fine.I am not anemic,my doctor is puzzled by this and can not figure out why.I am terrified of having something seriously wrong with me and worried i am being misdiagnosed,please help!I also go through frequent spells of dizziness,feeling faint,muscle weakness/stiffness,fatigue,chest pain and abdominal tightness/pressure and i feel like i cannot get enough air.