Read some Psalms before going to bed and ask God to calm your spirit. Also help yourself by drinking some camomile tea with a little honey, or warm milk with a little cinnamon to help you relax.
Lord help this mother get proper sleep so she can take care of her children during the day. Heal whatever is causing her this insomnia. Have your perfect will be done in her life and her family. I pray this in Jesus name, amen.