Hi, I'm new here and looking for some advice. I suffer from fibromyalgia and also drink a lot of water but I'm still thirsty. I also feel the need to go toilet a lot but find I don't actually need to. I have an arachnoid cyst that is pressing on my pituitary gland. I would like to see an endocrinologist to see if this may be causing the problem. All my blood tests for thyroid levels, cortisol and hormone, diabetes came back normal. II've got a feeling that it may not be a staightforward case. live in Wales and am looking to go to a Spire or Nuffield Hospital. Could anyone recommend a specialist please?