I also had balloon sinuplasty over a year and a half ago. I also suffer from chronic headaches with varying degrees of pain. I am being treated as a migraine patient and get Botox for migraines every 12 wks, take Qulipta daily and use Ubrelvy as a rescue med. 3 CT Scans and 2 MRIs show nothing. I have also tried Gabapatin and Pregabalin and they help but really make me out of sorts so will not take during the work day. Do you have any updates since you last posted? I hope you are finding relief.