I read your post about your 15 year old having headaches and Im 17 and having the same problems. I hit my head on a locker at school on January 29 and have had the same headache for 7 weeks now. I have went to school about 7 days since then. I was told not to do anything stenuous, like exercise. I have 2 neurologist and my regular physicians. They thought it was a tension headache and then a migraine. I had to get a CT scan and a MRI. The results came back today from my MRI and I had a post dramatic concussion. One of my neurologist called me in something to take for the pain, but I dont sleep very well. Im dehydrated most of the time and have flu like symptoms. I get low fevers and nausea. I have the teeth problems too. Good luck to your daughter about getting better, I know what shes going through.