Possibly. Insomnia covers difficulty getting to sleep as well as waking up in the middle of the night and not being able to get back to sleep. While even good sleepers awaken five to 15 times each night, most fall asleep within a few seconds and forget that they have been awake. Studies show that at least half of all sleep problems are caused by such issues as marital stress, job stress, anxiety, or depression. If you are having trouble falling back to sleep, pay attention to the thoughts running through your mind. They may help you find the cause of your problem.