I did an IUI nov last year.
Yes, it is Clomid/whatever med u taking day 5-9 and then my gynae checked me on day 12. I had to go in with a full bladder, as apparently it helps him see the growth/measurement of the follicles better. My bladder was SO full, I could barely move and if he pressed to hard, I would twinge (about to wet my pants) So he told me to go empty it!
When you go on D-day, u bring the washed sperm sample from the clinic/pathologist with you (keep it warm... i put it in my bra while driving)
the procedure itself is alot like a papsmear.. they basically just "inject" the sperm right next to your tubes, so they dont have far to swim. Then u lie there for about 30-40min, giving a swimmers a chance to swim and keeping gravity abay... from there you can go. So i'd say about an hour in total?
I got my mom to drive me home... sometimes you get pain (almost like menstrual pain) and I bled a little afterwards, but its not too much to be concerned about apparently.
Hope this helps. Good luck!