Yes, the broken nose could be the reason. Your sinuses are blocked and that is why you are having so much pain. They will be chronically infected too, if they can't drain. My husband's sinuses above his eyes were chronically blocked many many years ago. The docs said the chronic infection would eat through the bone, into his brain, if not taken care of.
So, he had the sinusus above his eyes obliterated, they don't exist anymore. Then he had drain channels put into the sinuses in the cheeks, and finally he had a rhinoplasty on the nose, bacause like you, his nose was messed up. It all really helped! He had to have the cheek sinuses redone about 20 years later (done first in 1982, redone in 2000). He's probably had 1-2 sinus infections since 1982.