This pain suddenly hits around the right eye, nose, and jaw and makes me miserable over and over and over and over for weeks to months, then goes away for months to years. I'm not working right now and just begged my doctor for a prescription of Sumatriptan until I can see him. I already know he'll schedule brain scans that will come up inconclusive and cost me hundreds of dollars - been there, done that many times.
Not to sound simple, but have you looked into the possibility of sinus infection?
Benadryl helps with my headaches. It may sound over simple but you have tried the expensive route.