I can only assume this is the same scan they did before removing my gallbladder and it did induce an attack. It can also make you feel like you will vomit horribly, but most of the time you don't actually vomit. Just be prepared for the feeling and remember that it passes very quickly. Take slow, deep breaths to help the feeling pass.
My test (and subsequent surgery) were several years ago, but I have been much better in that department since it was done. It is one surgery that I would have repeated if necessary. I did, however, get a stomach virus the day after I was released from the hospital, so be really careful about exposure to others after any procedure. That virus was actually worse than the surgery. If the do surgery, just be prepared for quick bathroom visits when necessary, but this should get better fairly soon too.
All the best!
DDD, CPS, TLIF L5-S1 2009 (failed), FIBRO, MINEYER'S (SP?), MIGRAINES, GERD, NISSEN FUNDOPLICATION (failed), GAD, DEPRESSION, EXTREME ANXIETY DISORDER, OCD, PSTD, CHRONIC MUSCLE SPASMS, HUMAN GROWTH HORMONE DEFICIENCY, VITAMIN D DEFICIENCY and much, much more...