I think it is possible. I am in the same situation with my daughter who will be 7 tomorrow. We had a very bad experience on her birthday last year and it set the emet off. I have been emet since I was 6, so we knew it was possible that she had it. That birthday party was really the first time either if my kids had noro and it really set me off too and I have to admit my reaction was not the best. I was a mess for days and so was she. She lost weight, would only eat certain things and would have panic attacks often. We took her to the doctor and he sent her to a psychologist and then they set her to a psychatrist for medication. She is on prozac now and has come along way since last year but with her birthday being tomorrow her and I are both on edge. I would take her to the psychatrist see what they think about medication. I know ours said that if it affects her daily life then she needed medication and with my daughter it does. THe medication has helped, but the psychologist helps with learning how to control the panic attacks. I would just be there for her, as far as sitting in the bathroom I do not know how I would handle that, it would probably freak me out. I would start with the doctors and they will be able to tell you how to handle certain situations, at least ours has. Good luck and I hope she is ok!