Have you ever blacked out?

Ok so heres the story, My older sister is pregnant so we were going to her ultrasound app. that day and it was as normal a day as ever. She had her friend and her baby GiGi come along, and her husband (my brother-in-law). It was me and my younger sister who decided at the last minute to go. Anyways we get to her apartment and we were hanging out like usual my sister was all over-wheled and crazy. Anyways we drove to the clinic and we all gathered in a really tight packed room with all of us in it plus the nurse. And mind you it was hot in there. So Im watching the baby on the screen and all I kept feeling was dizzy and really hot. Now Ive only fainted once before after hitting my head against a glass table, but this time seemed different, and I woke up differently too. As I was watching the baby I looked over at my little sister and that was the last thing I remember. As I came to all I remeber is seeing blue carpet in my face and a man leaning down and asking if I could hear him. I was in such shock I couyldnt talk or do anything so I was in and out of conciousness. Then I came to again and I was flipped over and I noticed the lights were on now. I honostly thought I was dreaming but apparently I wasnt. Basically my sister told me I tilted to one side and slammed into a medical cart and hit my head against a table corner (I hit my head all the time, lucky for my I wasnt bleeding this time though) It had felt as if though someone had hit me in the back of the head with a metal bat. Soon the room was full of Paramedics and they were asking me all these weird question just to verify that I had not suddenly forgot things. They had intially thought I had a seizure because I have Nero problems with my eyes but I later find out that I was completely dehydrated. So Basically I got to ride in an ambulence for the first time and I had to sit in the hospital for almost 5 hours with an IV (which hurt by the way because she missed my vein like three times) Im still dizzy from hitting my head but basically the moral of this story is, drink a lot of water folks, and when u feel as if you are going to pass out. For the love of god sit down or get as low to the ground as possible. Because hitting your head is not fun, and I know this all too well. Oh yea and Hospital food, If they offer you the sandwich saw no, it only makes things worse, go with the saltine crackers.