I agree that these don't sound like the typical symptoms of diabetes. Headaches could mean vision problems, though. Or allergies. Might want to have eyes checked out in case she needs glasses. Or see if her headaches seem to coincide with high pollen days.
Another thought about headaches... (there are SO many possible causes for headaches!!!) see if there is any pattern to when she gets headaches. Some people get headaches when blood sugar drops, so if they tend to happen when she hasn't eaten for a long time or right after meals, you may want to ask her doctor to check for hypoglycemia.
Hello! I'm not a medical professional, just the parent of a kid with diabetes. Those symptoms do not sound to me like pre-diabetes. Check with your doctor about the symptoms you are seeing. Good luck.