I got my last obstruction from a CT! It was the Metamucil, 4 or 5 cups of it, that did it. So if you're already (partially) obstructed I would pass on the Metamucil and ask if there are other contrasts they can use.
That last time I was in hospital for 5 days with an ng tube and lots of steroids. Nil by mouth for 4 of those days until the steroids finally kicked in. The previous 2or 3 times I went to the ER for an obstruction I was given morphine for the pain, which sometimes helped and sometimes made matters worse (it tends to slow down the gut, not ideal when you have an obstruction), but it came right in due course on it's own account.
I also used to go on a liquid diet as soon as I thought I may be having an obstruction and many times that was enough to resolve it.
After the last one I never came right anymore despite all the pred and a resection was scheduled a few months after. I haven't had one since, fingers crossed you don't either!