I feel so breathless when I ve reduced airways due paranasal congestion, often nasonex (mometasone) don't fix the problem, any solution without turbinate surgery?

See an allergist. Nasonex (mometasone) does not work on all people and some people may benefit from adding a nasal antihistamine spray as well. About 25% of the people may benefit greatly from singulair when all else failed. Be sure to aim the Nasonex (mometasone) towards the outside direction of you nose so that the spray can reach the turbinates. I think it is time for you to consult an allergist.