Yeah. I passed out and did a face plant 3 weeks ago. When I got to the ER, my blood was like sludge. They had to stick me 4 or 5 times to get enough blood for the labs. I was in the hospital for a week, having umpteen bags of fluids pumped into me thru an IV.
For the first 2 or 3 days, I nearly barfed when I smelled food.