Dear friend
Why would you start to say prayers to God to only desire to fall asleep? That surely is not the way, that is not the way to pray at all, to converse with your Divine Creator.
If you want to ask however to be granted with the gift of a goodnights sleep you need only say to your Guardian Angel ‘Sweet Angel my Guardian dear sent by God to defend me, pray sweet Angel that I may sleep and in my sleep pray for me and those I love and in my sleeping and waking protect me from all evil’ and to the Blessed Virgin Mother Mary ‘Pray Mother that I may sleep like a baby in your arms’ and to the Holy Spirit ’ Grant me and convict me of sincerity in my heart and lead me to peace of heart, Christ Jesus; and to a restful sleep’ and to Jesus ‘I ask because I believe it will be done, grant me, in your infinite Mercy, sleep sweet Jesus’ and to God the Father ‘Your Will be done for me’.
That is it friend, believe what you ask for and it shall be done if it is the Father’s Will.
Don’t forget the doctor that God created and gifted should you have a need for him/her. Don’t forget that which might keep you awake is a matter to be resolved and so don’t forget the confessional and the peace of heart to be found there, in by and through Christ Jesus, by the power of the Holy Spirit and because the Father wills it.
God Bless you and much love and peace to you
Teresa