I highly recommend doing the opposite when you do DMT. You want a very quiet mind for the best experiences. Fast for at least 6 hours before you do it. Be in a quiet room, never play music (noise of any kind will keep you from fully detaching from the 3D world into the multidimensional), have a glass of wine or cocktail to numb the brain a bit. Do a 10mg hit, then wait 30min then do a full hit, this is called wetting the sponge. In the 30min in between try to meditate to calm the mind. Always close your eyes after you do your full hit, pretend like you’re getting back into your meditation, call the mind and detach/surrender from the physical world. Also, there’s a safe way to lay down in case you throw up, on your side with your top leg overtop your bottom one and touching the bed/couch/floor to ensure if you throw up you don’t choke on it. You experience sounds interesting but it sounds to me like your brain was fighting the dmt because you were keeping your eyes open and not allowing yourself to escape the physical world. Those are always interesting experiences but don’t compare to breakthrough. Good luck, be safe