I'm new to all this and basically just got diagnosed a couple of weeks ago with PA and I've also had iron deficiency anaemia for a good few year too. I'm generally feeling rubbish, have absolutely no energy, no patience and snappy plus only getting a few hours sleep a night. I have also become a bit low in mood..I thought this was all down to not sleeping. Doctor is convinced I have depression and has given me anti depressants even though I've never had it before and I really think it's more to do with the B12. I've also just had my 4th loading dose injection this morning and then after the 6th I've to have 1 every 12 weeks depending on my levels when they get checked again. My question is how soon am I likely to see the effects? I don't feel any better yet and I'm currently on the sick from work while I'm not sleeping and feeling this way. I can't seem to concentrate on anything and have really loud tinnitus on a night time which doesn't help the sleeping. I just wanna be back to normal!