The scariest moment of my life

So I went to the doctor yesterday to get some more birth control pills and she's like, "I recommend you get the HPV vaccination." So I was like, "Sure, why not?" Sounded like a good idea, might as well, right? After all, it reduces your chance of getting cervical cancer quite significantly. So I go into the little lab room and sit down in the chair. I ask the lab tech if it's going to hurt, she says, "Yeah, but it's not that bad.." etc. etc. Well, the needle itself didn't really hurt, but when the medicine started flowing through me, it hurt ALOT and felt cold. Regardless, I wasn't really scared, I've felt pain before, it was not a big deal. A couple seconds later, I started feeling really dizzy and light-headed. The lab tech asks if I'm OK and I say something like, "I feel weird...I didn't eat or drink anything today.." Then, instead of passing out, which seemed like what should of happened, I fell into this weird, extremely scary "in-between" state. My body was trying to faint, but my mind was keeping me conscious. Everything slowly got dark and fuzzy and then finally black. I tried to put my head between my knees, but the lab tech told me not to do that, to just uncross my legs and then she kept asking me all of these questions about school and I kept trying to answer them and I was FULLY conscious! Still everything was going black and I was hot and my chest hurt soo bad and I couldn't breathe. The panic set in pretty quickly, so I started screaming and crying...I couldn't do anything else. I thought, for a minute, that I was going to die. I kept seeing fuzzy silhouettes of the lab techs (now there were two) fanning me off and trying to get me to drink a juice box. It was like a really old black and white movie, with no grays, just black and white and it was extremely fuzzy. I then tried to give in and let myself just pass out...but my mind wouldn't let me! The lab techs put ammonia up to my nose and I breathed it in, it helped a little bit and so did the juice, it made things a little better, but it felt like I was in this state for at least 30 minutes and probably alot less time had actually passed. Eventually, very slowly, everything started getting better...I could see better, I could breathe better and my chest didn't hurt as much. I think they should have laid me down and elevated my feet because when this happens, apparantely you're not getting enough blood to your brain. I think it was seriously the scariest moment of my life.