Insomnia can be caused by so many, many things. Could be nutritional-related as in you're anemic, or deficient in vitamins and minerals or iron. Could be due to your lifestyle. Could be related to a health problem. Could be related to a social or work situation that has you stressed out.

There are cognitive sleep behavioral therapists who can help you determine what the cause of your insomnia is. Can you ask your doctor for a referral to a sleep specialist? Ask for a sleep study. I had one done that showed I am a naturally segmented sleeper and also, as we age, our sleep patterns drastically change. We become lighter sleepers with age which means insomnia can happen because of hormonal changes in the body for both men and women.