First time donating, I don't know if I can go back.

Donated for the first time today, they took 1099mls. I've never felt worse! My appointment was at 10:30, it's now 2:30 and I've thrown up 4 times, and blacked out once so far.

For reference I'm 5'4, 220.

I don't WANT to quit going, but I don't think I can do that much again.

Is it possible to ask for them to lower it? I'm pretty lost.