I didn't have sinus cancer, but most everyone has 30 treatments. I think that is the standard of care for head and neck, sometimes more. I feel like the treatment is cummulative and they want to make sure that the cells are irradiated enough to kill them. You might want to ask your radiation oncologist this question. Someone else might have a better explanation.

I think almost everyone has gone through the depression thing. I did for about two weeks and then snapped out of it without antidepressants, but everyone's different. I do have to take something to sleep every once and a while.

Welcome!!! So sorry to hear about your diagnosis.
Hang in there. We're here to help.
Lynn