No cancer, it's sinusitis! Listen to your doctor!
I'm having sinus headaches/pressure from seasonal allergies (today is really bad). I have a brain tumor fear, so of course I keep thinking it's that. But it's allergy season & everyone is saying allergies are really awful this year, so I keep telling myself that's all it is. Yeah, it sucks, but it'll pass. Follow your doctor's instructions & you'll get better.