Sudden smell of incense

Today I was in class and suddenly smelled that incense scent. Recognized it from the last time I had went to my favorite Wicca store. I remember that the customer told me that that scent was a dragon one, used for the dragons only.
My school doesn't have incenses or anything like this. However, there are some history of old students and teachers that died suddenly, either by suicide or by some sort of accident.
Still I don't think it was a spirit, because a few days ago I felt a dragon's presence while meditating.
What are your thoughts?

Be thankful the spirit blessed you with it's presence and let you know of it's existence. Many are not fortunate to have this happen. Could you recognise the scent that was there?

Well I dont burn incense never liked the smell and when I do burn candles they're older list pure Pete beeswax they burn completely nothing left to him but I walked in my room and I got a strong odor of incense Then followed by a mysterious call on my cell that hung up number I did not recognize what does it mean not sure but I'm sure as sure as I'm writing this one in this form that it means something and that we are not alone born and raised Catholic and attend church but open-minded