My P6 kid is so stressed over PSLE, is this normal and how to help?

Been through PSLE with two kids, one high-strung like yours. What helped most was me changing, not the kid. I stopped treating PSLE like life-or-death, because kids absorb our anxiety. With the AL scoring system now, the difference between one AL band is often just a few marks and there are many good secondary paths, DSA, IP, express, all lead somewhere. I sat her down and honestly told her: your worth is not this exam, we love you the same whatever the result. Practically: we cut down to fewer but focused practice, protected her sleep like gold (tired brain cannot perform), kept exercise and one fun activity in the week, and I stopped comparing with other kids. Her marks actually went UP when the pressure came down, because she wasn't frozen with fear anymore. If she is crying and not sleeping, that is a red flag, please prioritise her mental health over marks. A burned-out 12-year-old is a bigger problem than one AL point.