I have a dry stuffy nose & i find it hard to breathe. i've had it for a while & i have a nasal spray but it's not helping. what could be causing this?

Many reasons.: You may have an allergic condition which should be confirmed by an allergist. The reason why your nasal spray (a Rx one?) did not work may be from incorrect technique or incorrect diagnosis. You may need to get checked out for sinus infection as well. If the allergist finds significantly crooked nasal septum, he may refer you to an ENT also.