one of the hardest things I've ever done

I have a doctor's appointment this morning. they're going to do some typical tests, like cholesterol and that means I had to start fasting at 8:30 last night. I can't eat until my appointment is over so I've probably got another two or three hours to go. I know it seems like that's not such a big deal but for me, it is. I haven't eaten in 11 hours now and I'm not sure how much longer I can hold out.