Myself Dr Josh- and I’m happy to help with your question today.
Yes, it possible that you have developed such allergy from Christmas tree.
Actually it can be mold spores on these plants.
Such Christmas trees and wreaths may cause breathing discomfort to some persons.
I understand that you don't have history of asthma, but such breathing discomfort could be related with spores from Christmas tree.
You can take OTC Zyrtec.
Also, Atrovent nasal spray can help with certain allergy symptoms.
Most likely this is related with allergic reaction.
Please get it clinically evaluated from your doctor.
Hope this helped
If you have any further question then you can ask me.
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