Hi, New here! I'm 26 and was diagnosed with pernicious anaemia and hyperthyroidism back in January. Had my first lot of loading dosages 6 shots in 2 weeks and now have 1 shot every 3 months (had the last 1 one month ago) Just wondering how long this usually takes to improve symptoms as I'm still fatigued all the time and sleeping 12 hour days and have no concentration to do much. Also with this i can feel a lot more depressed, Is this another symptom? Also what things can cause this as have good diet, No family history etc or is it just one of those things.