Anyone suffered from insomnia while pregnant? My cousin is 6 months along and has trouble sleeping at night. She usually gets sleep only after 4am. What can she do to overcome this problem?

I had this problem too. I just went with the flow. One of the nights I would get tired enough to sleep at the normal timing. Haha. I would refrain from taking caffeine (in fact I didn't at all) and not eat before I sleep so I would not feel too bloated. I tried not to do anything too vigorous before bedtime or watch game shows that are too exciting as well.