Need some help

When trying to wild I always get to the stage where its hard to breate, my whole body feels really numb and I "get the sensation of the black that I see from my closed eyes sort of washing over me, as if it is extending beyond my normal view" (had to copy this because I couldnt really describe it). After a few minutes my breating goes back to normal and the numb feeling around my body goes away. Any Idea what the problem is? Thanks in advance.

Hi,

At what time are you performing your wild technique?
Before going to sleep or with WBTB?

yo

Before going to sleep.