My niece has been suffering from severe headache since a month. She also gets shivers. Doctors prescribed LONAZEP 0.25 mg 1/2 tablet after dinner and NOCTURA SYRUP 5 ml after dinner both for 15 days. But there's no effect at all. She still has severe headache. She sits quietly holding both sides of her head. She eats well and remains active when she doesn't have the headache. She gets headaches 3-4 times a day. Please advise. Thanks. The EEG and MRI reports are normal.