Look into Adrenal Fatigue as to why you can not sleep in the first place
Your sleep issue maybe caused by adrenal fatigue. The adrenal glands regulate blood pressure, blood sugar, cortisol & adrenaline levels & over 50 hormones. With continual stress and/or poor diet the adrenal glands become fatigue causing such things as sleep issues, mood swings, anxiety, depression, etc. A pilot’s life style..ie time zone changes, airport/hotel/airline food, stress from wx etc is most likely causing your sleep issue.
According to adrenal experts 80% of adults will suffer from adrenal fatigue sometime in their adulthood. It’s the most missed diagnosed issue by doctors. Get tested for cortisol levels, vitamin/mineral deficiency & hormonal imbalance (yes for men too) by a adrenal gland doctor.
To heal the adrenal glands you need a very good clean diet no sugar, alcohol, junk food, plus you will need adrenal vitamins/minerals, possible hormonal balancing with pill/cream, plenty of rest & relaxation & good sleep (obviously for you the last one is not going to happen until you get your adrenals working correctly again).
google Adrenal Fatigue to learn more.