K, a couple ibruprofen and sweat pants and maybe "gross" underwear that are comfortable, perhaps even the elastic is worn out of. you just dont want anything too tight afterwards. but otherwise, it's really a quick procedure with minimal pain. go in with the mindset "it's just like my annual exam" - seriously, it's about that long, a few seconds of pain, then kinda goopy feeling but fine for the rest of the day (this was my experience, i hope it goes as smoothly for you!). oh, and get a milkshake afterwards if you can - you deserve it!