Hello i had a realy strange experiance. i tryed to become lucid trough this technique

relax

get the feeling ur are sinking down

consentrate on it and it increases to a point it u wil feel u are getting ript out of your own body

i had done it many times but never succeeded i even start to question if i can become lucid trough it

but here is the strange thing

ok so i was doing it and the feeling got pretty intence suddenly i felt like somethign cracked in my mind and i saw a strange symbol something like black veins that crossed eachother forming a pattern it was realy black i could see it like good even do when i closed my eyes there is already a black color present but this color was much more black. after it i lost the feeling and i started to get a fever for 4 days i also had hallucunations these 4 days i was prettty scared after it wat could it have been