Does anybody here pass out from seeing blood? What is your experience like?

I had my first experience like that tonight and it was really intense. I immediately started shaking and sweating uncontrollably and then my vision went white. I got really scared because this has never happened before so I didnt know what was happening.

I've heard of people passing out or feeling faint when seeing blood but the sweating?! I have never sweat this hard in my life!