The Blood-Mobile

I gave blood today for the first time in about 5 years. Last time I passed out afterwards so this time I was prepared - I stayed laying down. It was a good thing because I quite suddenly went from feeling fine to uh-oh, I am going to puke and breaking out in a sweat. They took my blood pressure and put ice packs on my chest and under my neck and made me stay in the blood-mobile for a long time. I didn't feel well all day after that.