I Have Seasonal Allergies That I Can Usually Keep Under

I have seasonal allergies that I can usually keep under control at the first signs and symptoms. This fall, the typical symptoms of itchy throat, etc. did not present. I ended up with diagnosed sinusitis, and a horrific cluster migraine on the left side of my face. I have endured this since the middle of October, for about one month now. the headaches literally lay me flat in bed. It is impacting my life...work, family, keeping up on everyday life. I realize docs should not prescribe addictive drugs (even though--wouldn't you know it--they do actually take care of the pain), but is there NOTHING that can get these under control? I've spent around $2000 at doctor office, even got CT scan, which showed some deviation in sinuses, and a helluva lot of inflammation, but infection went away on antibiotics. How can I end this debilitating pain?? Or do I just learn to live for months on end like this??