I would call the vet and see if he can see her right away. He may be able to do something. Do you by any chance feed her a fish only diet or live fish? Comforting her and holding her in between the seizures is good...comfort her and love her. I would put her on something soft...a towel or something...when she is having the seizures but I wouldn't hold her during them. I am so sorry this is happening. I would call the vet right away..maybe he can help.