B12 or PA i'm confused now!

Can anyone help? I thought I had it sewn up by thinking you only had the auto-immune disease P.A if you had IF anti-bodies. I am strongly positive for gastric parietal cell anti-bodies but  I don't have IFAB'S.

I was very anaemic when I found I had a B12 of 173 (not too low) but lower than norm levels, after trying iron supps and liver for a couple of months all was ok except the B12 never increased. My GP just tells me I have stomach problems and need injections for life, ok fair do's and I have improved dramatically since my jabs, but what do I have B12 def or Pernicious Anaemia???

any replies greatly welcomed!