I developed sleeping problems in my late 50's. It was so bad that I have had to stop and sleep on the side of the road on training rides or falling asleep talking to my wife in the middle of the day. On a 1200km event in France, I had to sleep like 6 times. I do not have any magic solutions or ideas to give because it is very complicated and I am quite sure my issues would be different than yours. Other than sleeping only a few hours per night can be hard on you.

I would only say to speak with your doctor. There are medical conditions that might apply here.