A variety of breathing problems can result in "air hunger". In the past oral and injectable
narcoticsDrug abuse and tranquilizers have been used to relieve this scary sensation. More recently, inhaled medicines have been used for this purpose with some success, including morphine and another narcotic called Fentanyl. Fentanyl is also available as a skin patch for the treatment of chronic pain. I could find no reports of this medicine being used as a patch for air hunger. However theoretically it might work.
The danger with any of these medicines is that they can suppress breathing. Therefore, the doses given would have to be carefully prescribed and monitored by your pulmonologist.
You need to check with your OB and maybe they can refer you to a plmo. doc in a nearby city.