Hi, I was diagnosed with ME nearly 15 years ago. I have had some better spells during that time, but tend to keep relapsing with the usual digestive, sleep, brain fog, temperature, blood sugar, adrenal type symptoms. Three years ago I relapsed pretty badly with the constant feeling of as I can only describe as going too fast inside and extreme anxiety, with a system that seems to over repond to the smallest noises and situations. I've had a pinprick test for b12 which came back at just over 200 and can see many of these symptoms could link to a b12 deficiency ( weight loss, numbness, tingling, sore tongue, memory problems, breathlessness, brain fog to name a few). Could anyone suggest the best next move please, should I try a b12 active test or are there tests I can request at the docs please? (My iron and ferritin are only ever just above the lowest level, but doc always insists this is okay) Any ideas would be greatly appreciated please.