Daily headaches

So i have been getting these headaches for about a year or So, and At first They were like 3 Times a week but now They are daily. My parents took me to the doctor a month ago and We did a blood test but everything seems fine. The doctor seems to think it might be allergies and gave me some nose spray to use for 60 days, but So far It has not done anything. The headaches seem to be getting worse and i don't know What to do. Does anyone know What this is or What to do?