@123d– I am very sorry you are dealing with this.
I think you will find that most people will recommend the same things.
Humidification/Humidifier at night. Any type of moisture you can add into your nasal passages. Oils/Gels. Be careful for things recommended that cause dryness.Stay hydrated.
Contact one of the few honest ENTs in the country who help/assist patients with ENS.
Also important component to this, work with a somatic or biofeedback therapist, who can help with the pain/sleep aspect. Stay active and try to stay positive.