What should I do for headache at both sides of forehead and swelling in center?

I have consulted with few doctors, none of them are able to find the cause of my headache. I suffer from headaches, migraines almost daily, also pain around nose. (both sides) I have also done Sinus Scan but all 4 sinuses were clear as per report. There is also swelling in center of forehead, which appears sometimes and goes away itself. I have also done few blood tests including CBC, TSH, Iron, FBS, also urinalysis and ECG/ECO, all reports were fine. What should I do now? Kindly help.