hello this is dr. chintan solanki here. You told you have consulted many doctors, so they must have given some medicines. If you can tell me those detail, I can give you specific recommendation.However still I want to inform you thoroughly. She is likely suffering from primary insomnia as you told that she doesn t have any stress or other problems. Secondary insomnia is due to some physical or psychiatric condition and for that that disease should be treated for good sleep. In her case she would be treated with benzodiazepiens. Specific doctor you should go is psychiatrist , if you have not consulted, please take her to psychiatrist as sleep disorder in allopathy practice fall under psychiatry. A warm cup of hot milk before 15 minutes to bed can help in good sleep, as my 30-40% patients don t require medicines after using this remedy. There are some rules called Sleep Hygiene which can be found on internet. Try to follow them So her evaluation is needed by a psychiatrist for specific treatment. I have tried my best to give answer. if still any confusion. late me know. Regards.