Suggest Remedies For Constant Headaches,migraines And Body Aches

Im 18 and have been suffering constant headaches daily this is accompinied by sever migraines,body aches and nausea I have done CT Scans and do regular blood tests but they can't seem to find whats wrong. I have been trying to avoid painkillers but i've had to go back to them as my headaches are more severe and frequent. Are there any natural remedies to help with the pain and do you think these symptons are underlying serious health problems.