well, first of all, I would start practicing during the day instead of at night when you're going to bed. should help a little bit.
in addition, I like to practice balancing on the border of wake/sleep at night when i go to bed. one trick i learned was to tap your finger on your bed as you're falling asleep at night. if you fall asleep you'll catch yourself not tapping anymore and it will wake you up. then start tapping again. just keep doing this as long as you want before falling asleep. it makes you more familiar with that state so it's easier when you do AP practice.
also, don't be discouraged. sometimes it can take some time, nothing to worry about. it will come, all in good time.
in addition, I like to practice balancing on the border of wake/sleep at night when i go to bed. one trick i learned was to tap your finger on your bed as you're falling asleep at night. if you fall asleep you'll catch yourself not tapping anymore and it will wake you up. then start tapping again. just keep doing this as long as you want before falling asleep. it makes you more familiar with that state so it's easier when you do AP practice.
also, don't be discouraged. sometimes it can take some time, nothing to worry about. it will come, all in good time.