Quote Originally Posted by Oxium View Post
... I only wake up for 5 minutes, ... I feel like my mind is so blurry that I can't think straight, and all I can focus on is sleeping... I just fall asleep instantly.
The point of WBTB is to wake up your mind just enough, so when you go back to sleep, you don't just fall into unconscious asleep. If you fall asleep instantly, you didn't get yourself awake enough, or you are not using a mantra to keep your mind aware.

It may take some experimenting as to how long to stay up. And even then it may be different every time.

Put the lights on and do some math problems in your head on your way to the restroom. You only need to stay up, until you think clearly, but you are still sleepy enough to fall asleep. If after trip to restroom you are still not awake enough, read some of your older dreams from your journal, or write an affirmation. Something like "I'm WILDing. It is easy for me to do. I love my dreams and lucids. Tonight I'm doing [your goal].

Then get yourself comfortable. Start reciting your mantra in your mind. That will keep your mind awake long enough to experience your body falling asleep and then you are free to enter a dream. Hope this helps