Like most of you, I have a long story and may bore you with it another time (!) but for now I would be really grateful if you could let me know if you think my jitteriness is due to the B12 injection I had yesterday. I was positive for the antibody, my B12 was 210 and I'm on the second of 6 loading doses, which I'm finally having twice a week. I have many other symptoms (thanks, PAS, what a relief to know brain fog is common in PA people) but this is a new one. Feels like a tremor/shivery feeling. I haven't noticed any improvement in anything yet. Thanks everyone for being there, it's so reassuring to know other people have similar experiences, not just with the illness itself but with sceptical medics.