it sounds like you have the same kind tests i had. they should do it at once.
it was my first time having a blood test, ever. i thought i was going to faint on site, gladly i didn't. lol. the nurse could tell how nervous i was.
my doc required 6-7 tests for the blood work, but they only took 2 giant vials, and 1 regular small one. the giant vial is like 2.5 size of a small one so it feels like i have 6 vials in total. yikes. lol. but it was less than 3 minutes maybe because i'm skinny? the moment she tap my arm, my veins are all popping up. lol.
i thought of looking away. though i couldn't help but gluing my eyes at the spot and i wouldn't stop looking. and i actually thought it helped to make the time fly by quicker. i also dry to drink water so i don't dehydrate myself. i heard lots of people fast, but don't drink water, which make the process quite painful due to them being so dehydrated and make it harder to draw blood.