maybe you're under too much stress.sometimes you hardly feel the pressure exists,but it's really on your heart.do not think too much before sleep,and concerate your whole idea on the sleeping.or you can think one thing repeatly,such as count sheep,count number until you're tired enough,then you'll be into a deep sleep.if still doesnt work,you can try yoga or pilate or see a psychiatrist to get some expert advice.

same here.

You are very healthy, it's your wealth. Try to keep your health as flexing as ever.

A regular schedule helps, variable work hours does not make for a regular schedule.

everyone is different

I'm a 22 year old male and for the past five weeks I've been sleeping less and less but I have lots of energy even when I don't sleep much or not at all. I try shutting my eyes and keeping them shut till I fall asleep but it's like my body tries to force them open. I've taken zquil to help me sleep but more often then most it doesn't completely help and I've tried exercising during the day to burn off some energy, but I'm still wide awake at night. I work six days a week and my hours vary each day, I can go form working six hours one day then twelve the next and ten the next. My job isn't all that demanding physically but last year I could sleep for seven to eight hours with no problem. So what gives?