Going blank.

Okay so, yesterday night, i went downtown to take a blood test, and since i had taken the same kind twice already, i went alone, and i thought everything would go just fine, or so i thought.
Anyhoo, i took the test, and they told me to wait and sit down for about 5 minutes before i would leave and go home, but after 1 minute, my arm started to feel really numb and wierd.
2 minutes passed and i started to get hot and sweat a bit, and when the third minute came, my eyes started to lose focus on everything, and i started to feel really wierd and dizzy.
At last i could not stand sitting there and feeling so funny, i had not felt that way in a very long time. So i got up, and got ready to leave, and started walking, then out of the door, soon out of the section.
But to my amazement, it started to get worse, and soon my mind became blank, everything around me turned white and blue, and i could no longer walk or stand, and after holding on to the wall and stumbling, i decided to head back and ask for help.
There was no need to, for as i crawled around and turned back to find somewhere where i could find help, one of the staff ladies came and helped me out, and she let me sit and rest and have some tea for about 20 minutes. i looked at myself in the mirror afterwards, and my face was really pale, amazingly white, which was something i never experienced before.
After a while i started feeling better, though i was still sweating and kind of shaken by what had just happened.
Soon, i was well enough to go, and since i had to go home, i was able to without any further dizziness or blankness. But i was feeling really tired and wiped out having to walk for a long time through out the city and having to walk home from the bus, and oh boy was i suprised that i even made it.
Anyways, all that to say, i hope i never have to take a blood test again!