I don't have any known allergies but i have a lot of nasal congestion daily since december to the point i can not breathe through my nose.

Many possibilities: You can develop allergies at almost any age...An allergist can take a history and do some simple testing to help you figure it out. Sometimes chronic nasal congestion is from "over-active" sinus tissue , and not from an allergy. Either way there are very good treatments to help you. This is an annoying symptom, but usually not serious. After so many months seeing an allergist would be worthwhile.