Sign Of Aging

I can feel I am getting older. Few years back I can sleep anywhere even on a carpet or a couch especially after a night shift but now even we have the expensive foam mattress it takes time before I can go to sleep. I get tired now even just doing one night. I remember I used to do five to six nights per week and I can stay awake and can even go shopping in between my night shift. Now I cannot do what I did before. I am only 35 but I feel 50 right now...