I am scared of sleeping alone in a closed quite room. even a new born baby or a dog in a room makes me feel comfortable while sleeping what to do?

Sleep association : You have a sleep association disorder. It is usually found in children, and the way to treat it is to gradually reduce the availability of the reassuring thing. So if someone were to spend time with you at bedtime, but leave before you fall asleep, come back if necessary, but leave again, over a few days you might get over it.