Weird Blood Donation Side Effects
I donated blood two days ago, and experienced an odd side effect-- the same one that I've experienced every time I've donated thus far. I wasn't panicked, nor do I have a fear of needles or blood, but about 1/2 pint of the way through, I began to feel extremely dizzy and nauseated, partially blacked out, and then vomited WHILE giving blood. During this, my blood flow slowed to a crawl. After vomiting, I felt perfectly fine and was able to resume blood donation without any dizziness or weakness. My blood even started flowing more quickly.
This has happened before, in a highschool PE class while doing a high-energy workout, and at a concert while jumping around. Both times, I felt extremely faint and dizzy, vomited, and was perfectly fine again.
..What is going on?