I have ATN. I have constant pain, a background temple headache and a boring/burning pain in my sinus.
On top of this I get the searing/stabbing/grinding/electric attacks in the sinus where it is like someone has turned a dial up on the pain from a 5/10 to a 10/10. My attacks last a minute or two, I broke my previous long attack record today and had one that lasted 11 minutes. I may have a few attacks a day or I may have blocks of nearly constant attacks for 2 hours at a time.
It sounds like it very well could be ATN.
Do you have altered sensation in your skin on your face? Is there tingling post an attack?