Thanks, David. At the moment, I'm furious that after visiting every doctor in my GP practice, and mentioning it to docs in hospital, the muscle weakness/fatigue has been dismissed as Crohn's symptoms, and the pins and needles as just something odd. After the messing about with the ANA I got in to see the senior doctor at the practice who goes straightaway 'yeah, pins and needles? that's peripheral neuropathy, let's get you in to see the neuro'. If the diagnosis was that simple, why wasn't it picked up 18 months ago? And he STILL insists the muscle weakness is Crohn's. I think the problem is, I appear perfectly normal when they do their little tests. But I've been sat in a waiting room all morning, I'm rested. If I'd been walking the dog or something, it would be a different story. And, before I got ill, I was a rock climber and learning trampoline! Up to 2 years ago, I could do maybe 5 chin ups in a row. A couple of days ago, I was playing with my niece, hung from the monkey bars, and seriously thought my shoulders were going to dislocate it was that painful!
Anyway this is turning into a rant and it wasn't meant to be! Thanks for the info. Just one thing, I did try taking b12 supplements in case the doctors were wrong. I tried 1000mcg sublingual tablets, and I also tried taking 2000mcg doses orally, each for about a month. Neither had any improvement in my symptoms. If I were deficient, would I have noticed an improvement from this, or was the dose not high enough/sustained for long enough do you think?