Maybe you are just more sensitive to what is happening when you are asleep. When my husband worked night shift, toward the end before retirement, any sound he made coming and going would wake me up. Do you sleep with the window cracked? Do you have dogs, children or such? Does the change of the heat or cold bother you? Endless amount of things can affect sleep as we age and things change around us. Speak to doctor but beware of what he gives you. Alot of things to sleep are for depression. The side effects of these is drowiness.