Is my nasal CT scan "normal"? (photo)

The ENT surgeon should treat the symptoms and not the CT image. 
Since you have a nasal blockage sensation and the nasal steroid trial has not given you any relief ,turbinoplasty is indicated. On the CT scan ,we can see clearly the lower turbinate markedly blocking the airway and also in the third anterior the turbinate bony framework should also be adjusted, therefore a minimal invasive OPD radiofrequency turbinate size reduction ,isn`t an option in your case.   

To give you a more accurate answer I would need to see more cuts of the films including the frontal and sphenoid sinuses.   From these two view your max and ethmoid sinuses look clear but your septum is mildly deviated to the right  and your inferior turbinates are enlarged. If medication doesn't help you you may benefit by at least a septoplasty and inferior partial turbinectomy.   I have done 1000s of these. And keep the q tips out of your nose please  :)

I see that your inferior turbinates are hypertrophic.  You do have clear sinuses.  There is no deviation of the septum.  You should have allergy testing and be treated with topical nasal steroids.  If this fails to alleviate symptoms, then a partial reduction of the turbinates should help.