I was doing this meditation yesterday at night and at a certain point the energy came up in such a way that my eyelids started shaking and my heart progressively speeded up his beating frantically. I couldn't handle the experience: I wanted so much what I knew that was next and keep saying to myself "let the thoughts flow and pass by... allow yourself to this experience... I allow myself", I wanted the light, but I just got nervous, anxious, excited and more thoughts coming and my breathing was distracting me... etc. I knew it was "lost", but I kept my eyes closed and focused on allowing, letting go... then, I felt like something pulling my "existence"... like I was watching the NOTHING, I was almost feeling part of the nothing... but the strenght that was pulling me wasn't constant. I felt really frustrated and immature after this. I don't know what to do. I feel capable of driving myself again to that particular moment of energy raising up but feel uncapable of dealing with it since that.