GREAT that your sister is with you @Melc503!! That makes it so much easier to go thru - and you have a driver! :) (Mind you, I would have throttled mine! LOL)
Arrive early, expect to go in late ..... take magazines (short stories are easier than books), maybe an iPod with music/headphones ...... drink LOTS of water afterwards to help 'wash it out'.
Make sure you take the tablets they recommend for nausea ..... usually you will feel tired 3-4 days after the session ... and this time will vary as you go thru your sessions - others will be more detailed than me - I was just observing my husband taking chemo (not me!)
Take care and good luck, xx