I used to have B12 all the time, and felt really healthy, now when my PA symptoms return and I go back on my injections, I get really bad, side effects. It is making me feel that it is just too dangerous to self inject. I only started doing it because my PA symptoms kept coming back really badly and my GP took me off injections and nothing else worked. I feel like some sort of dodgy junkie for doing it (which I am definately not) just beyond desperate to feel better. What can I do?