Thank you all for your good wishes. I rang the vet as i couldn't wait any longer and chance was just comming round from her operation. He said she had a big cyst attached to her spleen. He was able to remove it and he said it came away cleanly and couldn't say whether it was related to her problems before with her spaying. He said she will be fine but he just can't guareentee that another will grow. so the vet is keeping her till tommorrow and she should then be allowed home.