I smoked weed for my first time yesterday with one of my closest friends I only took one hit and I saw black spots then everything got black and next thing I knew he was standing over me asking if I was okay not sure what happened but after that I got up and felt really dizzy so I layer down for a little while and I was feeling really sick so I walked home (alone) and on my way home it literally felt like I was being dragged I don't know if this is normal but it scared the sh*t out of me so I don't think I will be smoking ever again.
It is unlikely that one "hit" would cause you to "black out" so quickly.
You may have had an anxiety attack. It can be enough for you to pass out. It can make you feel sick too.
I too hope you don't smoke again.