Well, Bluebell is home.
She has pancreatitis. I have to feed her Hill's Prescription i/d food, with no treats at all. (She didn't have many treats anyway).... the vet said it was the worst case of it she has seen, the other thing that might have upset her system (i am going to ask the vet) is that she was on cod liver oil and glucozamine (for her joints) - i have stopped these now as they might not have helped. She seems happy to be home, and she has had a bath and is now asleep on my lap! She is back at the vets next friday for a check up. At least we know what it is now i guess.