Had mine 2 weeks ago, couldn't stand up straight for 3 days. Horrible pain, bloating, couldn't eat. I tried everything people have said below - yoga moves (I take yoga on a regular basis anyway so knew some moves to do), lie on stomach, walk around to get things moving, heating pad. Nothing worked. I ended up in the hospital due to the pain - they never figured out what was wrong, maybe a tiny perforation that healed itself in a day or two. They did have me take 4 Mylanta (Gas-X 125mg works too) chewable tablets a day in the hospital. That really helped. One after each meal and one before bed. I'll start that right after the test from now on.
I'm convinced they put WAY too much air in your for the short test these days. They also use CO2 now which is supposed to be absorbed by your body. I don't believe that is the case for everybody however, as I know it was not the case for me. And it doesn't seem to expel as easily either like the normal air used to. And I feel it makes them lazy in sucking the air out. My old GI used to spray some liquid form of Gas-X after the test too - wish they would still do that.
UC - diagnosed 1994, in remission again
Meds: Colazal 3 pills/3x day, 1 mesalamine enema/day, VSL #3 DS 1 packet/day, Ultimate Flora 50 billion, iron, calcium, folic acid, L-lysine, Zyrtec, Yasmin, multi-vitamin, evening primrose oil, zinc
Tried Imuran but it affected my pancreas