@YSTW -- Luckily, I didn't get a headache. I just felt very tired and out of it. I had no idea why the woman took five vials of blood out of me. I thought it would never stop.
@Dr. Dan -- I bought a small bottle of orange juice for the train ride to the city, but didn't finish it, since it tasted rancid. I then came into the office, and had a coffee, which maybe I shouldn't have had. On the other hand, I had a nectarine and about half a plum, which I think helped.