This time last week I had had my normal three monthly B12 injection 2 weeks before and felt fine - even cycling each day. Family get together then bang - down with a stomach bug Sunday (no vomiting though) and spent the day in bed shivering etc. The rest of the family had it and recovered in 1 to 2 days but here we are, 5 days later and I have no energy at all, still feel queasy and I appear to have symptoms of iron deficiency - heart thumps, no energy at all, aching muscles (especially in my thighs) - I just had a shower and almost felt as though I couldn't raise my hands above my head to wash my hair as zero energy?? I have arranged a blood test for this afternoon but wondered if anyone else had exprienced this reaction to a bug? Maybe those of us with Hashi's are more vulnerable to effects from stomach bugs - I wondered if I would benefit from a Bio yoghurt as I still feel really iffy after eating and have no appetite anyway.