Thanks Mikey, I think mine sounds like the latter. You are a mine of information. I'm beginnig to put a few things together and you may be onto something with the Hormone thing. I've realised that my symptoms seem to increase significantly a few days before Menstruation, so I'm starting to think there may be a definite link. When I was ill with the same symptoms over twenty years ago, but not so profound, I was reccommended Progesterone by my Health Visitor. I'm sure it helped, so will carry on with it. Thanks again Tracy x