have u fainted before & why?

this is literally so embarrassing i was at school earlier today and we were dancing for a group project then as the music was playing my head started to get hella dizzy and my vision started getting blurrier and blurrier but it wasnt returning back and i deadass could not hear or see anything in that moment so like i immediately rushed to the bathroom to throw up but our school fucking sucks so the bathroom is connected to like the other building so i had to rely on my senses even though i couldnt walk straight and go up and down the stairs to the bathroom that unfortunately was locked so i had to go to the other bathroom in the other fucking building but bro my body was giving up on me fr until i saw some random teacher calling out my name bc he thought i looked unwell and deadass thats when i blacked out nd had to be escorted to the clinic ts was crazy btw i have anemia and hypotension