You said you go to sleep while meditating. Once you go to sleep, you can do nothing about it.But while you are awake trying to keep away all thoughts. When you pass into sleep that state in which you were before falling asleep will continue when you were before falling asleep will continue from where you left off when you fell into sleep.——-Maharishi Ramana.
Comments; As I am doing this practice for 35 years, it is true, sometimes in sitting when I sleep and after sometime as for ten minutes or more than I realize it that my practice in going on and I have not made more effort. i start it without effort. our aim is that meditation should be effortless effort.