answer:Has she been tested for mono? When I was in the 6th grade, I had migraines so terribly. I was taken out of school for like, three months. I had a really bad case of mono and couldn’t even take gym for a while, not to mention I lost an insane amount of weight. Because of my loss of appetite and I was probably sleeping 16 hours a day. I had never been so sick. It just makes you feel terrible. I still get tension headaches, or migraines some days. I’m on topamax and it really works wonders. When I take my medication, I rarely get any kind of headache at all.