Not sure what Ambien is - a "Big Pharma" sleep or depression aid? From long ago aerospace physiology class braincells, I recall
that the iron in our blood has a greater affinity for CO than for O2. That means, given the choice between the two, CO wins; the body loses. Time to get better exercise? I slept poorly for 20 years. Now, when I do get good exercise, I sleep fairly sound. Food
? More veggies and a walk after dinner has helped. Stress? - please reach out to someone if hurt or pain (physical or emotional) is keeping you up. We are all a mess, in need of healing, including those who don't believe they are. Many folks in the forum mention talking to a doctor; maybe so, but too many docs just give you a pill nowadays. What about healing? Follow your heart, please. But, please do not use the CO method - it is only a method to die. There are those who love you and need your love, including the knowitall sailors in the forum.
Chris & Carol-Ann